add: default theme applied in app. If no theme is there

1.5.1

README.md

@@ -7,7 +7,7 @@
 
 ### **A clean, open-source multimedia downloader for Windows**
 
-[![Release](https://img.shields.io/badge/Release-1.5.0-blue?style=for-the-badge)](https://github.com/MasterAcnolo/Freedom-Loader/releases)
+[![Release](https://img.shields.io/badge/Release-1.5.1-blue?style=for-the-badge)](https://github.com/MasterAcnolo/Freedom-Loader/releases)
 [![License: GPL v3](https://img.shields.io/badge/License-GPLv3-red.svg?style=for-the-badge)](https://www.gnu.org/licenses/gpl-3.0)
 [![Website](https://img.shields.io/badge/Website-Visit-404040?style=for-the-badge)](https://masteracnolo.github.io/Freedom-Loader-Site/)
 [![Workshop](https://img.shields.io/badge/Worshop-Visit-0E05A1?style=for-the-badge)](https://masteracnolo.github.io/Freedom-Loader-Workshop/)
@@ -26,7 +26,7 @@ The primary goal is to make media downloading accessible to users who want offli
 ### See related repo:
 
 - **[Website](https://masteracnolo.github.io/Freedom-Loader-Site/)** - Official project website and documentation
-- **[Workshop](https://masteracnolo.github.io/Freedom-Loader-Workshop/)** - Theme creation tool and theme browser
+- **[Workshop](https://github.com/MasterAcnolo/Freedom-Loader-Workshop)** - Theme creation tool and theme browser
 
 ## Table of Contents
 
@@ -165,7 +165,7 @@ Freedom Loader can be configured either through the settings panel in the UI or
 
 ### Configuration File Location
 ```
-C:\Users\[USERNAME]\AppData\Roaming\FreedomLoader\config.json
+%APPDATA%\Freedom Loader\config.json
 ```
 
 ### Available Options
@@ -179,11 +179,14 @@ C:\Users\[USERNAME]\AppData\Roaming\FreedomLoader\config.json
   "addMetadata": true,
   "verboseLogs": false,
   "autoDownloadPlaylist": true,
+  "createPlaylistFolders": true,
   "customCodec": "h264",
   "logSystem": true,
   "outputTitleCheck": true,
   "downloadSystem": true,
-  "notifySystem": true
+  "notifySystem": true,
+  "enableHardwareAcceleration": true,
+  "theme": "dark" 
 }
 ```
 
@@ -199,11 +202,14 @@ C:\Users\[USERNAME]\AppData\Roaming\FreedomLoader\config.json
 | `addMetadata` | boolean | `true` | Add metadata tags to downloaded files |
 | `verboseLogs` | boolean | `false` | Enable detailed logging for debugging |
 | `autoDownloadPlaylist` | boolean | `true` | Automatically download entire playlists |
+| `createPlaylistFolders` | boolean | `true` | Automatically create a folder for a playlist |
 | `customCodec` | string | `"h264"` | Video codec for encoding (supported: h264, h265, vp9, av1) |
 | `logSystem` | boolean | `true` | Enable application logging |
 | `outputTitleCheck` | boolean | `true` | Verify output file titles |
 | `downloadSystem` | boolean | `true` | Enable download system |
 | `notifySystem` | boolean | `true` | Enable system notifications |
+| `enableHardwareAcceleration` | boolean | `true` | Enable Hardware Acceleration |
+| `theme` | string | `dark` | Current Theme Name |
 
 ### Supported Codecs
 
@@ -423,39 +429,6 @@ ressources/
 
 See the most recent Roadmap [Here](https://masteracnolo.github.io/Freedom-Loader-Site/Roadmap).
 
-### Completed
-
-- [x] ~~Website and documentation~~
-- [x] ~~Automatic YT-DLP updates~~
-- [x] ~~Automatic application updates~~
-- [x] ~~Enhanced download status display~~
-- [x] ~~Video chapter extraction~~
-- [x] ~~Custom output path selection~~
-- [x] ~~Custom codec selection~~
-- [x] ~~Settings Panel with toggle switch for features.~~
-- [x] ~~Custom theme system (ZIP format) ~~
-- [x] ~~Theme Workshop (web tool)~~
-- [x] ~~Splash screen~~
-- [x] ~~Download stop button~~
-- [x] ~~Config saved in AppData (preserved on update)~~
-
-### In Progress
-
-- [ ] Additional format support (WebM, OGG, etc.)
-- [ ] Chrome/Edge cookie support
-- [ ] Improved multi-site support
-
-### Planned
-
-- [ ] Subtitle download and embedding
-- [ ] Multiple language support
-- [ ] Partial video downloads
-- [ ] Custom file naming patterns
-- [ ] Parallel downloads
-- [ ] Automatic sponsor detection (SponsorBlock integration)
-- [ ] Download history
-- [ ] Linux version
-
 ## Contributing
 
 Contributions are welcome and appreciated. This project benefits from community involvement.

app/autoUpdater.js

@@ -1,11 +1,42 @@
+/**
+ * Electron auto-update system using electron-updater.
+ *
+ * Handles:
+ * - update detection
+ * - user confirmation dialogs
+ * - download progress streaming to renderer
+ * - application restart and installation
+ */
+
 const { autoUpdater } = require("electron-updater");
 const { dialog } = require("electron");
 const { logger } = require("../server/logger");
 
+/**
+ * Configures autoUpdater behavior:
+ * - disables automatic download
+ * - disables automatic install on quit
+ * (manual user-controlled update flow)
+ */
 autoUpdater.autoDownload = false;
 autoUpdater.autoInstallOnAppQuit = false;
 
+/**
+ * Initializes application auto-update lifecycle.
+ *
+ * Registers update event listeners and binds them to:
+ * - UI dialogs (Electron dialog)
+ * - renderer communication (webContents)
+ * - download/install flow control
+ *
+ * @param {BrowserWindow} mainWindow - main Electron window instance
+ */
 function initAutoUpdater(mainWindow) {
+
+  /**
+   * Triggered when a new version is detected.
+   * Prompts user to install or defer update.
+   */
   autoUpdater.on("update-available", async (info) => {
     logger.info(`Update available: ${info.version}`);
 
@@ -28,6 +59,10 @@ function initAutoUpdater(mainWindow) {
     }
   });
 
+  /**
+   * Streams update download progress to renderer process.
+   * Used to update UI progress bar and status indicators.
+   */
   autoUpdater.on("download-progress", (progress) => {
     logger.info(`Download progress: ${Math.round(progress.percent)}%`);
     mainWindow?.webContents.send("update-progress", {
@@ -36,6 +71,10 @@ function initAutoUpdater(mainWindow) {
     });
   });
 
+  /**
+   * Triggered when update has been fully downloaded.
+   * Prompts user to restart application and install update.
+   */
   autoUpdater.on("update-downloaded", async (info) => {
     logger.info(`Update downloaded: ${info.version}`);
 
@@ -52,6 +91,10 @@ function initAutoUpdater(mainWindow) {
     if (response === 0) autoUpdater.quitAndInstall();
   });
 
+  /**
+   * Handles update system errors.
+   * Logs failure and displays an error dialog to user.
+   */
   autoUpdater.on("error", (err) => {
     logger.error("Auto update error:", err.message);
     dialog.showErrorBox("Update Error", err.message);
@@ -60,6 +103,10 @@ function initAutoUpdater(mainWindow) {
   checkForUpdates();
 }
 
+/**
+ * Manually triggers update check on startup.
+ * Separated from init for reusability and testability.
+ */
 async function checkForUpdates() {
   try {
     await autoUpdater.checkForUpdates();
@@ -68,6 +115,10 @@ async function checkForUpdates() {
   }
 }
 
+/**
+ * Manually triggers update download.
+ * Used when user accepts update prompt.
+ */
 async function downloadUpdate() {
   try {
     await autoUpdater.downloadUpdate();
@@ -76,6 +127,9 @@ async function downloadUpdate() {
   }
 }
 
+/**
+ * Immediately quits application and installs downloaded update.
+ */
 function installUpdate() {
   autoUpdater.quitAndInstall();
 }

app/dependencyCheck.js

@@ -2,9 +2,33 @@ const fs = require("fs");
 const { app, dialog } = require("electron");
 const { logger } = require("../server/logger");
 
+/**
+ * Verifies that all required native binaries exist before the app starts.
+ *
+ * This includes:
+ * - yt-dlp (download engine)
+ * - ffmpeg (media processing)
+ * - ffprobe (media inspection)
+ * - deno (JS runtime used by yt-dlp hooks)
+ *
+ * If any dependency is missing:
+ * - logs the error
+ * - shows a blocking Electron error dialog
+ * - exits the application
+ *
+ * @returns {boolean} true if all dependencies are present, false otherwise
+ */
 function checkNativeDependencies() {
+  /**
+   * Native dependency paths are resolved at runtime from the server helpers.
+   * This ensures correct resolution in both dev and packaged builds.
+   */
   const { binaryPaths } = require("../server/helpers/path.helpers");
 
+  /**
+   * List of required external executables used by the application runtime.
+   * Each entry defines a binary name and its resolved absolute path.
+   */
   const deps = [
     { name: "yt-dlp.exe",  path: binaryPaths.ytDlp },
     { name: "ffmpeg.exe",  path: binaryPaths.ffmpeg },
@@ -15,9 +39,16 @@ function checkNativeDependencies() {
   const missing = deps.filter(d => !fs.existsSync(d.path));
   if (missing.length === 0) return true;
 
+  /**
+   * Human-readable list of missing binaries for logging and user dialog display.
+   */
   const list = missing.map(d => d.name).join(", ");
   logger.error(`Missing dependencies: ${list}`);
 
+  /**
+   * Defers error dialog until Electron app is fully initialized.
+   * Required to safely display modal dialogs before quit.
+   */
   app.whenReady().then(() => {
     dialog.showErrorBox(
       "Missing dependencies",

app/discordRPC.js

@@ -2,12 +2,40 @@ const config = require('../config');
 const RPC = require("discord-rpc");
 const { logger } = require("../server/logger");
 
+/**
+ * Discord Application Client ID used to authenticate the RPC connection.
+ * Comes from the application configuration.
+ */
 const clientId = `${config.DiscordRPCID}`;
+
+/**
+ * Discord RPC client instance using IPC transport.
+ * Maintains a persistent connection with Discord desktop client.
+ */
 const rpc = new RPC.Client({ transport: "ipc" });
 
+/**
+ * Optional interval reference used for future RPC refresh logic.
+ * Currently reserved for potential periodic activity updates.
+ */
 let intervalId;
 
+/**
+ * Initializes Discord Rich Presence (RPC) connection.
+ *
+ * Responsibilities:
+ * - Connect to Discord via IPC transport
+ * - Set application presence (title, state, timestamps, assets)
+ * - Handle connection errors gracefully via logger
+ *
+ * Triggered once during application startup.
+ */
 function startRPC() {
+
+  /**
+   * Rich Presence payload describing current application state
+   * shown in Discord user profile.
+   */
   rpc.on("ready", () => {
     const presence = {
       largeImageKey: "icon",
@@ -27,10 +55,22 @@ function startRPC() {
   });
 }
 
+/**
+ * Gracefully stops Discord Rich Presence connection.
+ *
+ * Responsibilities:
+ * - Clear any running intervals
+ * - Remove current activity from Discord
+ * - Destroy RPC transport connection
+ * - Handle cleanup errors safely
+ */
 async function stopRPC(){
     try {
       if (intervalId) clearInterval(intervalId);
 
+      /**
+       * Ensures RPC connection exists before attempting cleanup.
+       */
       if (rpc && rpc.transport) {
         await rpc.clearActivity()
         await rpc.destroy();

app/ipcHandlers.js

@@ -1,3 +1,15 @@
+/**
+ * Electron IPC main process registry.
+ *
+ * Centralizes all IPC channels exposed to renderer process:
+ * - Application info (version, features)
+ * - Window controls (topbar actions)
+ * - File system interactions (theme, config, download paths)
+ * - UI state synchronization (progress bar)
+ *
+ * Acts as the bridge between renderer and privileged Node/Electron APIs.
+ */
+
 const { ipcMain, dialog, shell } = require("electron");
 const fs = require("fs");
 const path = require("path");
@@ -8,6 +20,12 @@ const config = require("../config");
 const { validateDownloadPath, getDefaultDownloadPath } = require("./pathValidator");
 const { userThemesPath } = require("../server/helpers/path.helpers");
 
+/**
+ * Security whitelist for feature flags that can be modified at runtime.
+ *
+ * Prevents unauthorized or unexpected configuration keys from being persisted.
+ * Acts as a basic validation layer for IPC "set-feature".
+ */
 const FEATURE_WHITELIST = new Set([
   "autoUpdate",
   "discordRPC",
@@ -20,20 +38,49 @@ const FEATURE_WHITELIST = new Set([
   "customCodec",
   "theme",
   "createPlaylistFolders",
-  "notifySystem"
+  "notifySystem",
+  "enableHardwareAcceleration"
 ]);
 
+/**
+ * Absolute path to the configuration file storing feature flags.
+ */
 const configFolderPath = featuresPath;
 
+/**
+ * Directory containing user-installed themes.
+ */
 const themeFolderPath = userThemesPath;
 
+/**
+ * Registers all IPC handlers and event listeners for Electron main process.
+ *
+ * This function wires renderer → main communication channels:
+ * - synchronous queries (handle)
+ * - fire-and-forget events (on)
+ *
+ * @param {Function} getMainWindow - Function returning current BrowserWindow instance
+ */
 function registerIpcHandlers(getMainWindow) {
     
-  // Infos générales
+  /**
+   * Returns application version from config.
+   */
   ipcMain.handle("version", () => config.version);
+
+  /**
+   * Returns runtime feature configuration object.
+   */
   ipcMain.handle("features", () => configFeatures);
 
-  // Sélection et validation de dossier
+  /**
+   * Opens native folder selection dialog and validates selected path.
+   *
+   * Ensures:
+   * - user cancellation is handled safely
+   * - selected path is validated against security rules
+   * - unsafe directories are rejected
+   */
   ipcMain.handle("select-download-folder", async () => {
     const result = await dialog.showOpenDialog({ properties: ["openDirectory"] });
     if (result.canceled) {
@@ -53,48 +100,108 @@ function registerIpcHandlers(getMainWindow) {
   ipcMain.handle("validate-download-path", (_, userPath) => validateDownloadPath(userPath));
   ipcMain.handle("get-default-download-path", () => getDefaultDownloadPath());
 
-  // Progression dans la taskbar
+  /**
+   * Updates Windows/macOS taskbar progress indicator.
+   *
+   * @param {number} percent - Progress value (0–100)
+   */
   ipcMain.on("set-progress", (_, percent) => {
     getMainWindow()?.setProgressBar(percent / 100);
   });
 
-  // TOPBAR ACTION
+  /**
+   * Window minimize request from renderer.
+   */
   ipcMain.on("window-minimize", () => getMainWindow()?.minimize());
+
+  /**
+   * Toggles maximize/unmaximize state of main window.
+   */
   ipcMain.on("window-maximize", () => {
     const win = getMainWindow();
     if (!win) return;
     win.isMaximized() ? win.unmaximize() : win.maximize();
   });
+
+  /**
+   * Closes the main application window.
+   */
   ipcMain.on("window-close", () => getMainWindow()?.close());
 
 
+  /**
+   * Opens Chromium DevTools in detached mode.
+   */
   ipcMain.on("open-devtools", () =>
     getMainWindow()?.webContents.openDevTools({ mode: "detach" })
   );
+
+  /**
+   * Opens application logs directory in system file explorer.
+   */
   ipcMain.on("open-logs",    () => logDir && shell.openPath(logDir));
+
+  /**
+   * Opens external website in default browser.
+   */
   ipcMain.on("open-website", () =>
     shell.openExternal("https://masteracnolo.github.io/Freedom-Loader-Site/")
   );
+
+  /**
+   * Opens official wiki page in external browser.
+   */
   ipcMain.on("open-wiki", () =>
     shell.openExternal("https://masteracnolo.github.io/Freedom-Loader-Site/wiki")
   );
+
+  /**
+   * Opens workshop page in external browser.
+   */
   ipcMain.on("open-workshop", () =>
     shell.openExternal("https://masteracnolo.github.io/Freedom-Loader-Workshop")
   );
+
+  /**
+   * Opens configuration folder in system file explorer.
+   */
   ipcMain.on("open-config", () => shell.openPath(configFolderPath));
 
   
   
-  // THEME
+  /**
+   * Retrieves available themes from filesystem.
+   */
   ipcMain.handle("get-themes", () => getThemes());
 
+  /**
+   * Opens theme directory in file explorer.
+   */
   ipcMain.on("open-theme", () => shell.openPath(themeFolderPath));
 
+  /**
+   * Reloads themes from disk dynamically.
+   */
   ipcMain.handle("reload-themes", async () => {
     return await reloadThemes();
   });
 
-  // Modification des features
+  /**
+   * Updates a runtime feature flag and persists it to disk.
+   *
+   * Flow:
+   * - Validates key against whitelist
+   * - Prevents unnecessary writes if value is unchanged
+   * - Updates in-memory config object
+   * - Persists to configuration file
+   *
+   * Security note:
+   * Only whitelisted keys can be modified via IPC to prevent config injection.
+   *
+   * @param {Electron.IpcMainEvent} event
+   * @param {{key: string, value: any}} payload
+   * @returns {boolean} success state
+   */
   ipcMain.handle("set-feature", (event, { key, value }) => {
         try {
           if (!FEATURE_WHITELIST.has(key)) {

app/pathValidator.js

@@ -2,28 +2,77 @@ const fs = require("fs");
 const path = require("path");
 const { logger } = require("../server/logger");
 
+/**
+ * Cached resolved default download path.
+ * Initialized lazily on first access to avoid unnecessary imports.
+ */
 let _defaultPath = null;
 
+/**
+ * Returns the application's default download directory.
+ *
+ * This value is lazily loaded and cached after first call.
+ * The path originates from server configuration helpers.
+ *
+ * @returns {string} Absolute default download path
+ */
 function getDefaultDownloadPath() {
+
   if (!_defaultPath) {
+
+    /**
+     * Lazy-loaded dependency providing the configured default download folder.
+     * Required only when function is executed to reduce startup cost.
+     */
     const { defaultDownloadFolder } = require("../server/helpers/path.helpers");
+
     _defaultPath = defaultDownloadFolder;
+
   }
   return _defaultPath;
 }
 
+/**
+ * Validates and sanitizes a user-provided download path.
+ *
+ * Steps performed:
+ * - Resolves absolute real filesystem path
+ * - Normalizes symbolic links via realpathSync
+ * - Checks path safety rules (blocks system-critical directories)
+ * - Falls back to default path if input is empty
+ *
+ * @param {string} userPath - User-provided directory path
+ * @returns {string} Sanitized absolute path
+ * @throws Error If path is invalid, unsafe, or inaccessible
+ */
 function validateDownloadPath(userPath) {
+  
+  /**
+   * Lazy-loaded helper used to enforce safe directory constraints.
+   * Prevents writes to protected system folders.
+   */
   const { isSafePath } = require("../server/helpers/validation.helpers");
 
   if (!userPath) return getDefaultDownloadPath();
 
   try {
+
+    /**
+     * Resolves filesystem symlinks to ensure canonical absolute path.
+     * Required to prevent path traversal or alias bypass.
+     */
     const resolved = fs.realpathSync(path.resolve(userPath));
     if (!isSafePath(resolved)) {
       throw new Error("Path not allowed: system folders are blocked!");
     }
     return resolved;
-  } catch (err) {
+  }
+  catch (err) {
+    
+    /**
+     * Handles invalid filesystem paths, permissions issues, or resolution failures.
+     * Logs diagnostic information before propagating a sanitized error.
+     */
     logger.error(`Invalid download path: ${userPath} — ${err.message}`);
     throw new Error(`Invalid or inaccessible path: ${err.message}`);
   }

app/splashManager.js

@@ -1,10 +1,27 @@
 const { BrowserWindow, app } = require("electron");
 const path = require("path");
 
+/**
+ * Reference to the splash screen BrowserWindow instance.
+ * Used during application startup before main window is ready.
+ */
 let splashWindow = null;
 
+/**
+ * Creates and displays the splash screen window.
+ *
+ * Responsibilities:
+ * - Initializes a frameless, always-on-top splash window
+ * - Loads splash HTML UI
+ * - Dynamically injects banner image depending on dev/production mode
+ * - Acts as startup visual feedback before main window loads
+ */
 function createSplashWindow() {
 
+  /**
+   * Configuration for splash screen BrowserWindow.
+   * Optimized for minimal UI and fast startup display.
+   */
   const splashOptions = {
     width: 400,
     height: 300,
@@ -19,13 +36,29 @@ const splashOptions = {
     },
   };
 
+  /**
+   * Instantiates the splash screen window.
+   */
   splashWindow = new BrowserWindow(splashOptions);
 
+  /**
+   * Absolute path to splash HTML file used as initial UI.
+   * Loaded locally from application bundle or project folder.
+   */
   const splashPath = path.join(__dirname, "../public/splash.html");
   splashWindow.loadFile(splashPath);
 
-  // Inject banner path for both dev and packaged app
+  /**
+   * Executes once splash HTML is fully loaded.
+   * Used here to inject dynamic assets (banner image path).
+   */
   splashWindow.webContents.on('did-finish-load', () => {
+
+    /**
+     * Resolves splash banner image path depending on runtime mode:
+     * - Production: bundled resources directory
+     * - Development: local build directory
+     */
     let bannerPath;
     
     // Check if app is packaged
@@ -36,12 +69,21 @@ const splashOptions = {
       bannerPath = path.join(__dirname, '../build/banner.png');
     }
     
+    /**
+     * Injects runtime image source into splash DOM.
+     * Uses file:// protocol to load local image safely in Electron context.
+     */
     splashWindow.webContents.executeJavaScript(`
       document.querySelector('img[alt="Freedom Loader"]').src = 'file:///${bannerPath.replace(/\\/g, '/')}';
     `);
   });
 }
 
+/**
+ * Closes and cleans up the splash screen window.
+ *
+ * Should be called once main window is ready to display.
+ */
 function closeSplashWindow() {
   if (splashWindow) {
     splashWindow.close();
@@ -49,6 +91,13 @@ function closeSplashWindow() {
   }
 }
 
+/**
+ * Updates splash screen progress indicator from main process.
+ *
+ * Sends a step value to renderer via injected JS function.
+ *
+ * @param {number} step - Current initialization step or progress value
+ */
 function setSplashProgress(step) {
   if (splashWindow) {
     splashWindow.webContents.executeJavaScript(`window.setProgress(${step})`);

app/themeManager.js

@@ -1,14 +1,48 @@
+/**
+ * Theme loading and parsing system.
+ *
+ * Supports:
+ * - Folder-based themes
+ * - ZIP-based themes
+ * - Theme validation against required schema
+ * - Image embedding as base64 data URIs
+ * - Cached theme registry with sorted priority order
+ *
+ * Acts as the core theme ingestion pipeline for the application UI.
+ */
+
 const fs = require("fs");
 const path = require("path");
 const { logger } = require("../server/logger");
 const JSZip = require("jszip");
 
+/**
+ * Maximum allowed size (in bytes) for theme images.
+ * Prevents memory abuse from large embedded assets.
+ */
 const MAX_IMAGE_SIZE = 10 * 1024 * 1024;
+
+/**
+ * List of supported image file extensions for theme assets.
+ */
 const ALLOWED_IMAGE_EXTENSIONS = [".jpg", ".jpeg", ".png", ".webp", ".gif", ".avif"];
+
+/**
+ * Allowed base filenames for theme background/cover images.
+ * Restricts theme asset resolution to known conventions.
+ */
 const ALLOWED_IMAGE_NAMES = ["cover", "background"];
 
+/**
+ * Priority order used to sort themes in UI.
+ * Themes not listed are placed at the end.
+ */
 const THEME_ORDER = ["dark", "light"];
 
+/**
+ * Required JSON schema paths for a valid theme definition.
+ * Each entry represents a nested property path that must exist.
+ */
 const REQUIRED_KEYS = [
   ["meta", "name"],
   ["meta", "author"],
@@ -20,10 +54,25 @@ const REQUIRED_KEYS = [
   ["style", "progressBar", "fill"],
 ];
 
+/**
+ * Safely retrieves a deeply nested value from an object using a key path array.
+ *
+ * @param {object} obj - Target object
+ * @param {string[]} keys - Property path segments
+ * @returns {*} value or undefined if path is invalid
+ */
 function getNestedValue(obj, keys) {
   return keys.reduce((acc, key) => acc?.[key], obj);
 }
 
+/**
+ * Validates theme JSON structure against required schema.
+ *
+ * Ensures all mandatory configuration keys exist before theme is accepted.
+ *
+ * @param {object} json - Parsed theme JSON
+ * @returns {{valid: boolean, reason?: string}}
+ */
 function validateThemeJson(json) {
   for (const keyPath of REQUIRED_KEYS) {
     if (getNestedValue(json, keyPath) === undefined) {
@@ -33,6 +82,14 @@ function validateThemeJson(json) {
   return { valid: true };
 }
 
+/**
+ * Normalizes raw theme JSON into application-ready theme object.
+ *
+ * @param {string} themeId
+ * @param {object} themeJson
+ * @param {string|null} imageData - Base64 encoded theme image
+ * @returns {object} normalized theme object
+ */
 function buildThemeObject(themeId, themeJson, imageData) {
   return {
     id: themeId.toLowerCase(),
@@ -45,6 +102,17 @@ function buildThemeObject(themeId, themeJson, imageData) {
   };
 }
 
+/**
+ * Extracts and encodes an image from theme archive into base64 data URI.
+ *
+ * Applies safety checks:
+ * - Rejects images exceeding MAX_IMAGE_SIZE
+ * - Converts file extension into valid MIME type
+ *
+ * @param {Buffer} buffer
+ * @param {string} filename
+ * @returns {string|null} data URI or null if invalid
+ */
 function extractImage(buffer, filename) {
   if (buffer.length > MAX_IMAGE_SIZE) {
     logger.warn(`Image too large, ignoring`);
@@ -55,6 +123,20 @@ function extractImage(buffer, filename) {
   return `data:image/${mime};base64,${buffer.toString("base64")}`;
 }
 
+/**
+ * Loads a theme from a ZIP archive.
+ *
+ * Steps:
+ * - Extract ZIP content
+ * - Locate .theme.json file
+ * - Validate JSON structure
+ * - Extract optional image asset
+ * - Build normalized theme object
+ *
+ * @param {string} zipPath
+ * @param {string} themeId
+ * @returns {Promise<object|null>}
+ */
 async function loadThemeFromZip(zipPath, themeId) {
   try {
     const zipBuffer = fs.readFileSync(zipPath);
@@ -91,6 +173,15 @@ async function loadThemeFromZip(zipPath, themeId) {
   }
 }
 
+/**
+ * Loads a theme from a directory structure.
+ *
+ * Equivalent to ZIP loader but works on filesystem directly.
+ *
+ * @param {string} folderPath
+ * @param {string} themeId
+ * @returns {Promise<object|null>}
+ */
 async function loadThemeFromFolder(folderPath, themeId) {
   try {
     const jsonFile = fs.readdirSync(folderPath).find(f => f.endsWith(".theme.json"));
@@ -124,13 +215,38 @@ async function loadThemeFromFolder(folderPath, themeId) {
   }
 }
 
+/**
+ * In-memory cache of loaded themes.
+ * Avoids re-parsing filesystem on every request.
+ */
 let cachedThemes = null;
+
+/**
+ * Active theme directory path used as source of truth.
+ */
 let themeFolderPath = null;
 
+/**
+ * Sets the active theme directory path.
+ *
+ * @param {string} folderPath
+ */
 function setThemeFolderPath(folderPath) {
   themeFolderPath = folderPath;
 }
 
+/**
+ * Loads all themes from the configured theme directory.
+ *
+ * Supports:
+ * - ZIP themes (.zip)
+ * - Folder themes (directory-based)
+ *
+ * Iterates through filesystem entries and delegates parsing
+ * to the appropriate loader (ZIP or folder).
+ *
+ * @returns {Promise<object[]>} List of valid theme objects
+ */
 async function loadThemesFromFolder() {
   const themes = [];
 
@@ -161,11 +277,31 @@ async function loadThemesFromFolder() {
   return themes;
 }
 
+/**
+ * Returns sorting priority for a theme ID.
+ *
+ * Lower index = higher priority.
+ * Themes not in THEME_ORDER are placed at the end.
+ *
+ * @param {string} id
+ * @returns {number}
+ */
 function getThemeOrder(id) {
   const index = THEME_ORDER.indexOf(id);
   return index === -1 ? Infinity : index;
 }
 
+/**
+ * Initializes the theme system.
+ *
+ * Steps:
+ * - Sets theme folder path
+ * - Loads all themes from disk
+ * - Sorts themes by priority order
+ * - Caches result in memory
+ *
+ * @param {string} folderPath
+ */
 async function initThemes(folderPath) {
   setThemeFolderPath(folderPath);
   const themes = await loadThemesFromFolder();
@@ -174,10 +310,24 @@ async function initThemes(folderPath) {
   logger.info(`Themes after sort: ${cachedThemes.map(t => t.id).join(", ")}`);
 }
 
+/**
+ * Returns cached themes.
+ *
+ * If themes are not loaded yet, returns empty array.
+ *
+ * @returns {object[]}
+ */
 function getThemes() {
   return cachedThemes ?? [];
 }
 
+/**
+ * Reloads themes from disk and refreshes cache.
+ *
+ * Used when themes are modified at runtime without restart.
+ *
+ * @returns {Promise<object[]>}
+ */
 async function reloadThemes() {
   const themes = await loadThemesFromFolder();
   cachedThemes = themes.sort((a, b) => getThemeOrder(a.id) - getThemeOrder(b.id));

app/windowManager.js

@@ -1,21 +1,55 @@
+/**
+ * Electron main window module dependencies.
+ * Handles BrowserWindow lifecycle and application UI shell.
+ */
+
 const { BrowserWindow, app } = require("electron");
 const path = require("path");
 const { logger } = require("../server/logger");
 const { configFeatures } = require("../config");
 const config = require("../config");
 
+/**
+ * Singleton reference to the main Electron BrowserWindow instance.
+ * Ensures only one application window exists at runtime.
+ */
 let mainWindow = null;
 
+/**
+ * Creates and initializes the main Electron application window.
+ *
+ * Responsibilities:
+ * - Ensures singleton window instance (prevents duplicates)
+ * - Configures window options (size, icon, preload, security settings)
+ * - Loads frontend application from local dev server
+ * - Handles lifecycle events (close, errors)
+ *
+ * @returns {Promise<BrowserWindow>} The created or existing window instance
+ */
 async function createMainWindow() {
+
+  /**
+   * Prevents multiple instances of the main window.
+   * Returns existing instance if already created.
+   */
   if (mainWindow) {
     logger.warn("Window already exists, no new creation!");
     return mainWindow;
   }
 
-  const iconPath = config.localMode
+  /**
+   * Resolves application icon path depending on runtime mode:
+   * - Development: local build folder
+   * - Production: packaged Electron resources
+   */
+  const iconPath = config.devMode
     ? path.join(__dirname, "../build/app-icon.ico")
     : path.join(process.resourcesPath, "build/app-icon.ico");
 
+  /**
+   * Electron BrowserWindow configuration object.
+   * Defines UI behavior, security settings, and preload bridge.
+   */
   const windowOptions = {
     title: `Freedom Loader ${config.version}`,
     icon: iconPath,
@@ -35,6 +69,10 @@ async function createMainWindow() {
 
   mainWindow = new BrowserWindow(windowOptions);
 
+  /**
+   * Loads the frontend application served by the local dev server.
+   * In production, this could be replaced with a file:// build.
+   */
   try {
     await mainWindow.loadURL(`http://localhost:${config.applicationPort}`);
     logger.info("Window loaded");
@@ -43,6 +81,10 @@ async function createMainWindow() {
     throw err;
   }
 
+  /**
+   * Cleans up window reference when the main window is closed.
+   * Prevents memory leaks and allows recreation if needed.
+   */
   mainWindow.on("closed", () => {
     logger.info("Main window closed");
     mainWindow = null;
@@ -51,6 +93,14 @@ async function createMainWindow() {
   return mainWindow;
 }
 
+/**
+ * Returns the current main window instance.
+ *
+ * Useful for IPC handlers and background services
+ * needing access to the renderer process.
+ *
+ * @returns {BrowserWindow | null}
+ */
 function getMainWindow() {
   return mainWindow;
 }

app/ytDlpUpdater.js

@@ -1,10 +1,33 @@
 const { execFile } = require("child_process");
 const { logger } = require("../server/logger");
 
+/**
+ * Attempts to update the local yt-dlp binary using its built-in update command.
+ *
+ * This function:
+ * - Executes yt-dlp with the `-U` flag
+ * - Logs update output or warnings if update fails
+ * - Never throws: update failure is non-blocking by design
+ *
+ * @param {string} ytDlpPath - Absolute path to the yt-dlp executable
+ */
 function updateYtDlp(ytDlpPath) {
+
   logger.info("yt-dlp update check starting...");
+
+  /**
+   * Executes yt-dlp CLI process in a non-interactive mode.
+   * Used here specifically for self-update via `-U` flag.
+   */
   execFile(ytDlpPath, ["-U"], (err, stdout) => {
+
+    /**
+     * Handles yt-dlp update result:
+     * - Logs warning if update fails (network, binary issues, permissions)
+     * - Logs stdout output when update succeeds
+     */
     if (err) logger.warn("yt-dlp update failed (continuing):", err.message);
+    
     else logger.info(`yt-dlp update: ${stdout.trim()}`);
   });
 }

config.js

@@ -3,41 +3,107 @@ const { app } = require("electron");
 const fs = require("fs");
 const path = require("path");
 
-const localMode = !app.isPackaged;
+/**
+ * Indicates whether the application is running in development mode.
+ * Determined by Electron's packaging state.
+ */
+const devMode = !app.isPackaged;
 
+/**
+ * Resolves the configuration file path depending on runtime environment.
+ *
+ * In development:
+ * - Uses local config/config.dev.json
+ * - Creates it from default if missing
+ *
+ * In production:
+ * - Uses app userData/config.json
+ * - Creates it from bundled default config if missing
+ *
+ * @returns {string} Absolute path to the active configuration file
+ */
 function resolveConfigPath() {
-  if (localMode) {
+  if (devMode) {
     const devConfigPath = path.join(__dirname, "config", "config.dev.json");
+
     if (!fs.existsSync(devConfigPath)) {
-      const defaultConfigPath = path.join(__dirname, "config", "config.default.json");
+      const defaultConfigPath = path.join(
+        __dirname,
+        "config",
+        "config.default.json"
+      );
       fs.copyFileSync(defaultConfigPath, devConfigPath);
     }
+
     return devConfigPath;
   }
 
   const userConfigPath = path.join(app.getPath("userData"), "config.json");
+
   if (!fs.existsSync(userConfigPath)) {
-    const defaultConfigPath = path.join(process.resourcesPath, "config", "config.default.json");
+    const defaultConfigPath = path.join(
+      process.resourcesPath,
+      "config",
+      "config.default.json"
+    );
     fs.copyFileSync(defaultConfigPath, userConfigPath);
   }
 
   return userConfigPath;
 }
 
+/**
+ * Path to the active configuration file used at runtime.
+ */
 const featuresPath = resolveConfigPath();
 
+/**
+ * Loads and parses the feature configuration file.
+ *
+ * @returns {Object} Parsed feature flags configuration
+ * @throws {Error} If the configuration file is missing or invalid
+ */
 function loadFeatures() {
   const raw = fs.readFileSync(featuresPath, "utf-8");
   return JSON.parse(raw);
 }
 
+/**
+ * In-memory snapshot of application feature flags.
+ *
+ * Note: Changes to the config file are not automatically reflected.
+ * A restart or reload is required.
+ */
 const configFeatures = loadFeatures();
 
 module.exports = {
-  version: packageJson.version,
+  /**
+   * Application version from package.json
+   */
+  version: devMode ? `dev-${packageJson.version}` : `v${packageJson.version}` ,
+
+  /**
+   * Backend Express / internal server port
+   */
   applicationPort: "8787",
-  localMode,
+
+  /**
+   * Indicates whether the app is running in development mode
+   */
+  devMode,
+
+  /**
+   * Discord RPC application identifier
+   */
   DiscordRPCID: "1410934537051181146",
+
+  /**
+   * Runtime feature flags loaded from configuration file
+   */
   configFeatures,
-  featuresPath
+
-}
+  /**
+   * Path to the active configuration file
+   */
+  featuresPath,
+};

config/config.default.json

@@ -13,5 +13,6 @@
   "outputTitleCheck": true,
   "downloadSystem": true,
   "notifySystem": true,
+  "enableHardwareAcceleration": true,
   "theme": "dark" 
 }

main.js

@@ -1,3 +1,8 @@
+/**
+ * Handle crash application and avoid ghost instance
+ */
+const { app } = require("electron");
+
 process.on("uncaughtException", (err) => {
   console.error("Uncaught exception:", err);
   app.quit();
@@ -8,44 +13,97 @@ process.on("unhandledRejection", (reason) => {
   app.quit();
 });
 
-const { app } = require("electron");
-const { createSplashWindow, closeSplashWindow, setSplashProgress } = require("./app/splashManager");
-const path = require("path");
 
+/**
+ * True if this is the primary instance (lock acquired successfully)
+ */
+const isPrimaryInstance = app.requestSingleInstanceLock();
+
+/**
+ * If we are on a second instance
+ */
+if (!isPrimaryInstance) {
+  app.quit();
+  process.exit(0);
+}
+
+/**
+ * Set App Name and AppID 
+ */
+app.setName("Freedom Loader");
+app.setAppUserModelId("com.masteracnolo.freedomloader");
+
+
+/**
+ * Load the app dependencies for hardware choice
+ */
 const { logger, logSessionStart, logSessionEnd } = require("./server/logger");
-const { initAutoUpdater } = require("./app/autoUpdater");
-const { startRPC, stopRPC } = require("./app/discordRPC");
-
 const { configFeatures } = require("./config");
+
+/**
+ * On start, enable or disable hardWareAcceleration
+ */
+if (!configFeatures.enableHardwareAcceleration){
+  app.disableHardwareAcceleration();
+  logger.info("Disabled Hardware Acceleration")
+} else {
+  logger.info("Enable Hardware Acceleration")
+}
+
+/**
+ * In-memory snapshot of application feature flags.
+ *
+ * Note: Changes to the config file are not automatically reflected.
+ * A restart could be required.
+ */
 const config = require("./config");
+
+if(config.devMode){
+  /**
+   * Start devTron extensions - @see https://github.com/electron/devtron
+   */
+  const { devtron } = require('@electron/devtron');
+  devtron.install(); 
+  logger.info("Loaded DevTron Extension")
+}
+
+/**
+ * Load the app dependencies 
+ */
 const { initThemes } = require("./app/themeManager");
 
+const { initAutoUpdater } = require("./app/autoUpdater");
+const { startRPC, stopRPC } = require("./app/discordRPC");
 const { checkNativeDependencies } = require("./app/dependencyCheck");
 const { updateYtDlp } = require("./app/ytDlpUpdater");
 const { createMainWindow, getMainWindow } = require("./app/windowManager");
 const { registerIpcHandlers } = require("./app/ipcHandlers");
+const { createSplashWindow, closeSplashWindow, setSplashProgress } = require("./app/splashManager");
 const { userThemesPath, initUserThemes } = require("./server/helpers/path.helpers");
 
-app.setName("Freedom Loader");
-app.setAppUserModelId("com.masteracnolo.freedomloader");
-app.disableHardwareAcceleration();
 
-if (!config.localMode) {
+/**
-  const gotLock = app.requestSingleInstanceLock();
+ * If another instance want to run
-  if (gotLock) {
+ */
 app.on("second-instance", () => {
-      logger.info("New instance detected, closing older...");
+  logger.info("Second instance detected");
-      getMainWindow()?.destroy();
+
+  const mainWindow = require("./app/windowManager").getMainWindow();
+
+  if (!mainWindow) return;
+
+  if (mainWindow.isMinimized()) mainWindow.restore();
+
+  mainWindow.show();
+  mainWindow.focus();
 });
-  }
-}
 
 app.whenReady().then(async () => {
   logSessionStart();
 
   createSplashWindow();
 
-  if (!config.localMode && !checkNativeDependencies()) return;
+  if (!config.devMode && !checkNativeDependencies()) return;
 
   const { userYtDlp } = require("./server/helpers/path.helpers");
   updateYtDlp(userYtDlp);
@@ -64,8 +122,6 @@ app.whenReady().then(async () => {
     setSplashProgress(3); // Almost ready
     await createMainWindow();
     
-    await new Promise(resolve => setTimeout(resolve, 2000));
-    
     closeSplashWindow();
     getMainWindow().show();
     if (configFeatures.discordRPC) startRPC();

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "freedom-loader",
-  "version": "1.5.0",
+  "version": "1.5.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "freedom-loader",
-      "version": "1.5.0",
+      "version": "1.5.1",
       "dependencies": {
         "chalk": "^4.1.2",
         "debug": "^4.4.1",
@@ -20,10 +20,21 @@
         "winston-daily-rotate-file": "^5.0.0"
       },
       "devDependencies": {
+        "@electron/devtron": "^2.1.1",
         "electron": "^41.2.0",
         "electron-builder": "^26.8.1"
       }
     },
+    "node_modules/@babel/runtime": {
+      "version": "7.29.7",
+      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.29.7.tgz",
+      "integrity": "sha512-Nq8OhGWiZIZGV6hLHoyAKLLcJihP/xFeBMGJoUrxTX2psI8dCifzLhZISFb+VWS3wFMRDmCGw5R+dOySCqPLhw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
     "node_modules/@colors/colors": {
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/@colors/colors/-/colors-1.6.0.tgz",
@@ -111,6 +122,27 @@
         "node": "*"
       }
     },
+    "node_modules/@electron/devtron": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/@electron/devtron/-/devtron-2.1.1.tgz",
+      "integrity": "sha512-hiNj9faRQJYVJ69TQyJ2+BWlMAc97xwuaol1XhRb2PM4FYn7ze569kOxycQodZlEq9Sim+9yu0TxFu7//Oagxg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@fontsource-variable/roboto": "^5.2.5",
+        "@fontsource/space-mono": "^5.2.5",
+        "@microlink/react-json-view": "^1.26.2",
+        "ag-grid-community": "^34.1.2",
+        "ag-grid-react": "^34.1.2",
+        "denque": "^2.1.0",
+        "lucide-react": "^0.513.0",
+        "react": "^19.1.0",
+        "react-dom": "^19.1.0"
+      },
+      "engines": {
+        "node": ">=22.12.0"
+      }
+    },
     "node_modules/@electron/fuses": {
       "version": "1.8.0",
       "resolved": "https://registry.npmjs.org/@electron/fuses/-/fuses-1.8.0.tgz",
@@ -511,6 +543,26 @@
         "node": ">= 10.0.0"
       }
     },
+    "node_modules/@fontsource-variable/roboto": {
+      "version": "5.2.10",
+      "resolved": "https://registry.npmjs.org/@fontsource-variable/roboto/-/roboto-5.2.10.tgz",
+      "integrity": "sha512-LJ0iLg6aHbLzN515gyHzmdTqJzd9NlI95cCg1DW0F5G7KkFqRLBBKBbqEJx4nSu4aby3IKmw3ZH6Fe928IfaSQ==",
+      "dev": true,
+      "license": "OFL-1.1",
+      "funding": {
+        "url": "https://github.com/sponsors/ayuhito"
+      }
+    },
+    "node_modules/@fontsource/space-mono": {
+      "version": "5.2.9",
+      "resolved": "https://registry.npmjs.org/@fontsource/space-mono/-/space-mono-5.2.9.tgz",
+      "integrity": "sha512-b61faFOHEISQ/pD25G+cfGY9o/WW6lRv6hBQQfpWvEJ4y1V+S4gmth95EVyBE2VL3qDYHeVQ8nBzrplzdXTDDg==",
+      "dev": true,
+      "license": "OFL-1.1",
+      "funding": {
+        "url": "https://github.com/sponsors/ayuhito"
+      }
+    },
     "node_modules/@isaacs/cliui": {
       "version": "8.0.2",
       "resolved": "https://registry.npmjs.org/@isaacs/cliui/-/cliui-8.0.2.tgz",
@@ -705,6 +757,25 @@
         "node": ">= 10.0.0"
       }
     },
+    "node_modules/@microlink/react-json-view": {
+      "version": "1.31.20",
+      "resolved": "https://registry.npmjs.org/@microlink/react-json-view/-/react-json-view-1.31.20.tgz",
+      "integrity": "sha512-gNLkGvjFDeAqVGvK3H7lfoDqetn/9lW2ugiYiJhchc7jQU1ZaKsZnt97ANluXWFfd/wifoA9TrVOTsUXwXCJwA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "react-base16-styling": "~0.10.0",
+        "react-lifecycles-compat": "~3.0.4",
+        "react-textarea-autosize": "~8.5.9"
+      },
+      "engines": {
+        "node": ">=17"
+      },
+      "peerDependencies": {
+        "react": ">= 15",
+        "react-dom": ">= 15"
+      }
+    },
     "node_modules/@npmcli/agent": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/@npmcli/agent/-/agent-3.0.0.tgz",
@@ -852,6 +923,13 @@
         "@types/node": "*"
       }
     },
+    "node_modules/@types/lodash": {
+      "version": "4.17.24",
+      "resolved": "https://registry.npmjs.org/@types/lodash/-/lodash-4.17.24.tgz",
+      "integrity": "sha512-gIW7lQLZbue7lRSWEFql49QJJWThrTFFeIMJdp3eH4tKoxm1OvEPg02rm4wCCSHS0cL3/Fizimb35b7k8atwsQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/ms": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/@types/ms/-/ms-2.1.0.tgz",
@@ -917,9 +995,9 @@
       }
     },
     "node_modules/@xmldom/xmldom": {
-      "version": "0.8.12",
+      "version": "0.8.13",
-      "resolved": "https://registry.npmjs.org/@xmldom/xmldom/-/xmldom-0.8.12.tgz",
+      "resolved": "https://registry.npmjs.org/@xmldom/xmldom/-/xmldom-0.8.13.tgz",
-      "integrity": "sha512-9k/gHF6n/pAi/9tqr3m3aqkuiNosYTurLLUtc7xQ9sxB/wm7WPygCv8GYa6mS0fLJEHhqMC1ATYhz++U/lRHqg==",
+      "integrity": "sha512-KRYzxepc14G/CEpEGc3Yn+JKaAeT63smlDr+vjB8jRfgTBBI9wRj/nkQEO+ucV8p8I9bfKLWp37uHgFrbntPvw==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -956,6 +1034,38 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/ag-charts-types": {
+      "version": "12.3.1",
+      "resolved": "https://registry.npmjs.org/ag-charts-types/-/ag-charts-types-12.3.1.tgz",
+      "integrity": "sha512-5216xYoawnvMXDFI6kTpPku+mH0Csiwu/FE7lsAm8Z22HEN6ciSG/V7g+IrpLWncELqksgENebCTP75PZ3CsHA==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/ag-grid-community": {
+      "version": "34.3.1",
+      "resolved": "https://registry.npmjs.org/ag-grid-community/-/ag-grid-community-34.3.1.tgz",
+      "integrity": "sha512-PwlrPudsFOzGumphi2y9ihWeaUlIwKhOra/MXu2LjeV2U8DgLLcYS8CartE5Hszhn1poJHawwI9HWrxlKliwdw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "ag-charts-types": "12.3.1"
+      }
+    },
+    "node_modules/ag-grid-react": {
+      "version": "34.3.1",
+      "resolved": "https://registry.npmjs.org/ag-grid-react/-/ag-grid-react-34.3.1.tgz",
+      "integrity": "sha512-1UTlBT+xJkjNZAuf7RxK61mgxKGTPB+6XR99oIHq7cYC89kJmLbWqhHt/1XqRWF5cAgSKk8u+HtOQaN8tAZStw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "ag-grid-community": "34.3.1",
+        "prop-types": "^15.8.1"
+      },
+      "peerDependencies": {
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0",
+        "react-dom": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      }
+    },
     "node_modules/agent-base": {
       "version": "7.1.4",
       "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-7.1.4.tgz",
@@ -1355,9 +1465,9 @@
       "optional": true
     },
     "node_modules/brace-expansion": {
-      "version": "5.0.5",
+      "version": "5.0.6",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-5.0.5.tgz",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-5.0.6.tgz",
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       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -1986,6 +2096,13 @@
         "node": ">= 8"
       }
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+    "node_modules/csstype": {
+      "version": "3.2.3",
+      "resolved": "https://registry.npmjs.org/csstype/-/csstype-3.2.3.tgz",
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+      "dev": true,
+      "license": "MIT"
+    },
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       "resolved": "https://registry.npmjs.org/debug/-/debug-4.4.3.tgz",
@@ -2103,6 +2220,16 @@
         "node": ">=0.4.0"
       }
     },
+    "node_modules/denque": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/denque/-/denque-2.1.0.tgz",
+      "integrity": "sha512-HVQE3AAb/pxF8fQAoiqpvg9i3evqug3hoiwakOyZAwJm+6vZehbkYXZ0l4JxS+I3QxM97v5aaRNhj8v5oBhekw==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=0.10"
+      }
+    },
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       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/depd/-/depd-2.0.0.tgz",
@@ -2794,12 +2921,12 @@
       }
     },
     "node_modules/express-rate-limit": {
-      "version": "8.3.2",
+      "version": "8.5.1",
-      "resolved": "https://registry.npmjs.org/express-rate-limit/-/express-rate-limit-8.3.2.tgz",
+      "resolved": "https://registry.npmjs.org/express-rate-limit/-/express-rate-limit-8.5.1.tgz",
-      "integrity": "sha512-77VmFeJkO0/rvimEDuUC5H30oqUC4EyOhyGccfqoLebB0oiEYfM7nwPrsDsBL1gsTpwfzX8SFy2MT3TDyRq+bg==",
+      "integrity": "sha512-5O6KYmyJEpuPJV5hNTXKbAHWRqrzyu+OI3vUnSd2kXFubIVpG7ezpgxQy76Zo5GQZtrQBg86hF+CM/NX+cioiQ==",
       "license": "MIT",
       "dependencies": {
-        "ip-address": "10.1.0"
+        "ip-address": "^10.2.0"
       },
       "engines": {
         "node": ">= 16"
@@ -3549,9 +3676,9 @@
       "license": "ISC"
     },
     "node_modules/ip-address": {
-      "version": "10.1.0",
+      "version": "10.2.0",
-      "resolved": "https://registry.npmjs.org/ip-address/-/ip-address-10.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/ip-address/-/ip-address-10.2.0.tgz",
-      "integrity": "sha512-XXADHxXmvT9+CRxhXg56LJovE+bmWnEWB78LB83VZTprKTmaC5QfruXocxzTZ2Kl0DNwKuBdlIhjL8LeY8Sf8Q==",
+      "integrity": "sha512-/+S6j4E9AHvW9SWMSEY9Xfy66O5PWvVEJ08O0y5JGyEKQpojb0K0GKpz/v5HJ/G0vi3D2sjGK78119oXZeE0qA==",
       "license": "MIT",
       "engines": {
         "node": ">= 12"
@@ -3566,6 +3693,13 @@
         "node": ">= 0.10"
       }
     },
+    "node_modules/is-arrayish": {
+      "version": "0.3.4",
+      "resolved": "https://registry.npmjs.org/is-arrayish/-/is-arrayish-0.3.4.tgz",
+      "integrity": "sha512-m6UrgzFVUYawGBh1dUsWR5M2Clqic9RVXC/9f8ceNlv2IcO9j9J/z8UoCLPqtsPBFNzEpfR3xftohbfqDx8EQA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/is-fullwidth-code-point": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
@@ -3690,6 +3824,13 @@
         "jiti": "lib/jiti-cli.mjs"
       }
     },
+    "node_modules/js-tokens": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
+      "integrity": "sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/js-yaml": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.1.1.tgz",
@@ -3827,6 +3968,13 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/lodash-es": {
+      "version": "4.18.1",
+      "resolved": "https://registry.npmjs.org/lodash-es/-/lodash-es-4.18.1.tgz",
+      "integrity": "sha512-J8xewKD/Gk22OZbhpOVSwcs60zhd95ESDwezOFuA3/099925PdHJ7OFHNTGtajL3AlZkykD32HykiMo+BIBI8A==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/lodash.escaperegexp": {
       "version": "4.1.2",
       "resolved": "https://registry.npmjs.org/lodash.escaperegexp/-/lodash.escaperegexp-4.1.2.tgz",
@@ -3874,6 +4022,19 @@
         "node": ">= 12.0.0"
       }
     },
+    "node_modules/loose-envify": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/loose-envify/-/loose-envify-1.4.0.tgz",
+      "integrity": "sha512-lyuxPGr/Wfhrlem2CL/UcnUc1zcqKAImBDzukY7Y5F/yQiNdko6+fRLevlw1HgMySw7f611UIY408EtxRSoK3Q==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "js-tokens": "^3.0.0 || ^4.0.0"
+      },
+      "bin": {
+        "loose-envify": "cli.js"
+      }
+    },
     "node_modules/lowercase-keys": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/lowercase-keys/-/lowercase-keys-2.0.0.tgz",
@@ -3897,6 +4058,16 @@
         "node": ">=10"
       }
     },
+    "node_modules/lucide-react": {
+      "version": "0.513.0",
+      "resolved": "https://registry.npmjs.org/lucide-react/-/lucide-react-0.513.0.tgz",
+      "integrity": "sha512-CJZKq2g8Y8yN4Aq002GahSXbG2JpFv9kXwyiOAMvUBv7pxeOFHUWKB0mO7MiY4ZVFCV4aNjv2BJFq/z3DgKPQg==",
+      "dev": true,
+      "license": "ISC",
+      "peerDependencies": {
+        "react": "^16.5.1 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      }
+    },
     "node_modules/make-fetch-happen": {
       "version": "14.0.3",
       "resolved": "https://registry.npmjs.org/make-fetch-happen/-/make-fetch-happen-14.0.3.tgz",
@@ -4361,6 +4532,16 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/object-assign": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
+      "integrity": "sha512-rJgTQnkUnH1sFw8yT6VSU3zD3sWmu6sZhIseY8VX+GRu3P6F7Fu+JNDoXfklElbLJSnc3FUQHVe4cU5hj+BcUg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/object-hash": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/object-hash/-/object-hash-3.0.0.tgz",
@@ -4705,6 +4886,18 @@
         "node": ">=10"
       }
     },
+    "node_modules/prop-types": {
+      "version": "15.8.1",
+      "resolved": "https://registry.npmjs.org/prop-types/-/prop-types-15.8.1.tgz",
+      "integrity": "sha512-oj87CgZICdulUohogVAR7AjlC0327U4el4L6eAvOqCeudMDVU0NThNaV+b9Df4dXgSP1gXMTnPdhfe/2qDH5cg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "loose-envify": "^1.4.0",
+        "object-assign": "^4.1.1",
+        "react-is": "^16.13.1"
+      }
+    },
     "node_modules/proper-lockfile": {
       "version": "4.1.2",
       "resolved": "https://registry.npmjs.org/proper-lockfile/-/proper-lockfile-4.1.2.tgz",
@@ -4752,9 +4945,9 @@
       }
     },
     "node_modules/qs": {
-      "version": "6.15.0",
+      "version": "6.15.2",
-      "resolved": "https://registry.npmjs.org/qs/-/qs-6.15.0.tgz",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.15.2.tgz",
-      "integrity": "sha512-mAZTtNCeetKMH+pSjrb76NAM8V9a05I9aBZOHztWy/UqcJdQYNsf59vrRKWnojAT9Y+GbIvoTBC++CPHqpDBhQ==",
+      "integrity": "sha512-Rzq0KEyX/w/tEybncDgdkZrJgVUsUMk3xjh3t5bv3S1HTAtg+uOYt72+ZfwiQwKdysThkTBdL/rTi6HDmX9Ddw==",
       "license": "BSD-3-Clause",
       "dependencies": {
         "side-channel": "^1.1.0"
@@ -4819,6 +5012,99 @@
         "url": "https://opencollective.com/express"
       }
     },
+    "node_modules/react": {
+      "version": "19.2.7",
+      "resolved": "https://registry.npmjs.org/react/-/react-19.2.7.tgz",
+      "integrity": "sha512-HNe9WslTbXmFK8o8cmwgAeJFSBvt1bPdHCVKtaaV+WlAN36mpT4hcRpwbf3fY56ar2oIXzsBpOAiIRHAdY0OlQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/react-base16-styling": {
+      "version": "0.10.0",
+      "resolved": "https://registry.npmjs.org/react-base16-styling/-/react-base16-styling-0.10.0.tgz",
+      "integrity": "sha512-H1k2eFB6M45OaiRru3PBXkuCcn2qNmx+gzLb4a9IPMR7tMH8oBRXU5jGbPDYG1Hz+82d88ED0vjR8BmqU3pQdg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/lodash": "^4.17.0",
+        "color": "^4.2.3",
+        "csstype": "^3.1.3",
+        "lodash-es": "^4.17.21"
+      }
+    },
+    "node_modules/react-base16-styling/node_modules/color": {
+      "version": "4.2.3",
+      "resolved": "https://registry.npmjs.org/color/-/color-4.2.3.tgz",
+      "integrity": "sha512-1rXeuUUiGGrykh+CeBdu5Ie7OJwinCgQY0bc7GCRxy5xVHy+moaqkpL/jqQq0MtQOeYcrqEz4abc5f0KtU7W4A==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "color-convert": "^2.0.1",
+        "color-string": "^1.9.0"
+      },
+      "engines": {
+        "node": ">=12.5.0"
+      }
+    },
+    "node_modules/react-base16-styling/node_modules/color-string": {
+      "version": "1.9.1",
+      "resolved": "https://registry.npmjs.org/color-string/-/color-string-1.9.1.tgz",
+      "integrity": "sha512-shrVawQFojnZv6xM40anx4CkoDP+fZsw/ZerEMsW/pyzsRbElpsL/DBVW7q3ExxwusdNXI3lXpuhEZkzs8p5Eg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "color-name": "^1.0.0",
+        "simple-swizzle": "^0.2.2"
+      }
+    },
+    "node_modules/react-dom": {
+      "version": "19.2.7",
+      "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-19.2.7.tgz",
+      "integrity": "sha512-t0BRVXvbiE/o20Hfw669rLbMCDWtYZLvmJigy2f0MxsXF+71pxhR3xOkspmsO8h3ZlNzyibAmtCa3l4lYKk6gQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "scheduler": "^0.27.0"
+      },
+      "peerDependencies": {
+        "react": "^19.2.7"
+      }
+    },
+    "node_modules/react-is": {
+      "version": "16.13.1",
+      "resolved": "https://registry.npmjs.org/react-is/-/react-is-16.13.1.tgz",
+      "integrity": "sha512-24e6ynE2H+OKt4kqsOvNd8kBpV65zoxbA4BVsEOB3ARVWQki/DHzaUoC5KuON/BiccDaCCTZBuOcfZs70kR8bQ==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/react-lifecycles-compat": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/react-lifecycles-compat/-/react-lifecycles-compat-3.0.4.tgz",
+      "integrity": "sha512-fBASbA6LnOU9dOU2eW7aQ8xmYBSXUIWr+UmF9b1efZBazGNO+rcXT/icdKnYm2pTwcRylVUYwW7H1PHfLekVzA==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/react-textarea-autosize": {
+      "version": "8.5.9",
+      "resolved": "https://registry.npmjs.org/react-textarea-autosize/-/react-textarea-autosize-8.5.9.tgz",
+      "integrity": "sha512-U1DGlIQN5AwgjTyOEnI1oCcMuEr1pv1qOtklB2l4nyMGbHzWrI0eFsYK0zos2YWqAolJyG0IWJaqWmWj5ETh0A==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@babel/runtime": "^7.20.13",
+        "use-composed-ref": "^1.3.0",
+        "use-latest": "^1.2.1"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "peerDependencies": {
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      }
+    },
     "node_modules/read-binary-file-arch": {
       "version": "1.0.6",
       "resolved": "https://registry.npmjs.org/read-binary-file-arch/-/read-binary-file-arch-1.0.6.tgz",
@@ -5033,6 +5319,13 @@
         "node": ">=11.0.0"
       }
     },
+    "node_modules/scheduler": {
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.27.0.tgz",
+      "integrity": "sha512-eNv+WrVbKu1f3vbYJT/xtiF5syA5HPIMtf9IgY/nKg0sWqzAUEvqY/xm7OcZc/qafLx/iO9FgOmeSAp4v5ti/Q==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/semver": {
       "version": "6.3.1",
       "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.1.tgz",
@@ -5227,6 +5520,16 @@
       "dev": true,
       "license": "ISC"
     },
+    "node_modules/simple-swizzle": {
+      "version": "0.2.4",
+      "resolved": "https://registry.npmjs.org/simple-swizzle/-/simple-swizzle-0.2.4.tgz",
+      "integrity": "sha512-nAu1WFPQSMNr2Zn9PGSZK9AGn4t/y97lEm+MXTtUDwfP0ksAIX4nO+6ruD9Jwut4C49SB1Ws+fbXsm/yScWOHw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "is-arrayish": "^0.3.1"
+      }
+    },
     "node_modules/simple-update-notifier": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/simple-update-notifier/-/simple-update-notifier-2.0.0.tgz",
@@ -5613,9 +5916,9 @@
       }
     },
     "node_modules/tmp": {
-      "version": "0.2.5",
+      "version": "0.2.7",
-      "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.2.5.tgz",
+      "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.2.7.tgz",
-      "integrity": "sha512-voyz6MApa1rQGUxT3E+BK7/ROe8itEx7vD8/HEvt4xwXucvQ5G5oeEiHkmHZJuBO21RpOf+YYm9MOivj709jow==",
+      "integrity": "sha512-e0votIpp4Uo2AJYSzVHV6xCcawuiez3DzqDAbrTc3YxBkplN6e+dM13ZeIcZnDg/QpSuU2zfZ3rzwY8ukEnaXw==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -5756,6 +6059,54 @@
         "punycode": "^2.1.0"
       }
     },
+    "node_modules/use-composed-ref": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/use-composed-ref/-/use-composed-ref-1.4.0.tgz",
+      "integrity": "sha512-djviaxuOOh7wkj0paeO1Q/4wMZ8Zrnag5H6yBvzN7AKKe8beOaED9SF5/ByLqsku8NP4zQqsvM2u3ew/tJK8/w==",
+      "dev": true,
+      "license": "MIT",
+      "peerDependencies": {
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      },
+      "peerDependenciesMeta": {
+        "@types/react": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/use-isomorphic-layout-effect": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/use-isomorphic-layout-effect/-/use-isomorphic-layout-effect-1.2.1.tgz",
+      "integrity": "sha512-tpZZ+EX0gaghDAiFR37hj5MgY6ZN55kLiPkJsKxBMZ6GZdOSPJXiOzPM984oPYZ5AnehYx5WQp1+ME8I/P/pRA==",
+      "dev": true,
+      "license": "MIT",
+      "peerDependencies": {
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      },
+      "peerDependenciesMeta": {
+        "@types/react": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/use-latest": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/use-latest/-/use-latest-1.3.0.tgz",
+      "integrity": "sha512-mhg3xdm9NaM8q+gLT8KryJPnRFOz1/5XPBhmDEVZK1webPzDjrPk7f/mbpeLqTgB9msytYWANxgALOCJKnLvcQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "use-isomorphic-layout-effect": "^1.1.1"
+      },
+      "peerDependencies": {
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      },
+      "peerDependenciesMeta": {
+        "@types/react": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/utf8-byte-length": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/utf8-byte-length/-/utf8-byte-length-1.0.5.tgz",

package.json

@@ -1,7 +1,7 @@
 {
   "name": "freedom-loader",
   "productName": "Freedom Loader",
-  "version": "1.5.0",
+  "version": "1.5.1",
   "author": "MasterAcnolo",
   "description": "Freedom Loader",
   "main": "main.js",
@@ -24,7 +24,9 @@
   },
   "devDependencies": {
     "electron": "^41.2.0",
-    "electron-builder": "^26.8.1"
+    "electron-builder": "^26.8.1",
+    "@electron/devtron": "^2.1.1"
+
   },
   "build": {
     "appId": "com.masteracnolo.freedomloader",

preload.js

@@ -1,27 +1,124 @@
 const { contextBridge, ipcRenderer } = require("electron");
 
+/**
+ * Exposes the main application API to the renderer process.
+ *
+ * This API acts as a secure bridge between the renderer and the
+ * Electron main process using IPC (Inter-Process Communication).
+ * All calls are explicitly whitelisted.
+ */
 contextBridge.exposeInMainWorld("electronAPI", {
+
+  /**
+   * Returns the default system download directory.
+   */
   getDefaultDownloadPath: () => ipcRenderer.invoke("get-default-download-path"),
+
+  /**
+   * Opens a native dialog allowing the user to select a download folder.
+   */
   selectDownloadFolder: () => ipcRenderer.invoke("select-download-folder"),
+
+  /**
+   * Sends download progress value to the main process (used for taskbar / UI sync).
+   *
+   * @param {number} percent - Download progress percentage (0–100)
+   */
   setProgress: (percent) => ipcRenderer.send("set-progress", percent),
+
+  /**
+   * Retrieves application feature flags (runtime configuration).
+   */
   getFeatures: () => ipcRenderer.invoke("features"),
-  setFeature: (key, value) => ipcRenderer.invoke("set-feature", { key, value }),
+
+  /**
+   * Updates a feature flag dynamically at runtime.
+   *
+   * @param {string} key - Feature name
+   * @param {any} value - Feature value
+   */
+  setFeature: (key, value) =>
+    ipcRenderer.invoke("set-feature", { key, value }),
+
+  /**
+   * Returns the current application version.
+  */
   getVersion: () => ipcRenderer.invoke("version"),
-  getValidatedDownloadPath: (path) => ipcRenderer.invoke("validate-download-path", path),
+
+  /**
+   * Validates a download path before using it for file operations.
+   *
+   * @param {string} path - Path to validate
+   */
+  getValidatedDownloadPath: (path) =>
+    ipcRenderer.invoke("validate-download-path", path),
+
+  /**
+   * Retrieves available themes from the filesystem or config layer.
+   */
   getThemes: () => ipcRenderer.invoke("get-themes"),
-  reloadThemes: () => ipcRenderer.invoke("reload-themes")
+
+  /**
+   * Forces a reload of theme files (useful after modification/import).
+   */
+  reloadThemes: () => ipcRenderer.invoke("reload-themes"),
 });
 
-// Contrôles de fenêtre et outils custom pour la topbar
+
+/**
+ * Exposes window control and developer utilities for the custom topbar UI.
+ *
+ * These methods forward commands to the Electron main process via IPC.
+ */
 contextBridge.exposeInMainWorld("topbarAPI", {
+
+  /**
+   * Minimizes the application window.
+   */
   minimize: () => ipcRenderer.send("window-minimize"),
+
+  /**
+   * Toggles maximize/restore state of the application window.
+   */
   maximize: () => ipcRenderer.send("window-maximize"),
+
+  /**
+   * Closes the application window.
+   */
   close: () => ipcRenderer.send("window-close"),
+
+  /**
+   * Opens Chromium DevTools for debugging.
+   */
   openDevTools: () => ipcRenderer.send("open-devtools"),
+
+  /**
+   * Opens application logs directory or log viewer.
+   */
   openLogs: () => ipcRenderer.send("open-logs"),
+
+  /**
+   * Opens the official website or project homepage.
+   */
   openWebsite: () => ipcRenderer.send("open-website"),
+
+  /**
+   * Opens the theme directory or theme editor interface.
+   */
   openTheme: () => ipcRenderer.send("open-theme"),
+
+  /**
+   * Opens project wiki/documentation.
+   */
   openWiki: () => ipcRenderer.send("open-wiki"),
+
+  /**
+   * Opens the workshop or external content library.
+   */
   openWorkshop: () => ipcRenderer.send("open-workshop"),
-  openConfig: () => ipcRenderer.send("open-config")
+
+  /**
+   * Opens configuration/settings panel.
+   */
+  openConfig: () => ipcRenderer.send("open-config"),
 });

public/index.html

@@ -175,28 +175,20 @@
                     </div>
                 </div>
 
+                <div class="setting-item">
+                    <input type="checkbox" data-key="enableHardwareAcceleration" id="enableHardwareAcceleration">
+                    <div class="setting-info">
+                    <span class="setting-title">Enable Hardware Acceleration</span>
+                    <small>Uses GPU acceleration for rendering when available. <br> (Be effective on next launch)</small>
+                    </div>
+                </div>
+
                 </details>
 
                 <!-- Developer Settings -->
                 <details class="settings-section">
                 <summary>Developer Settings</summary>
 
-                <!-- <div class="setting-item">
-                    <input type="checkbox" data-key="downloadSystem" id="downloadSystem">
-                    <div class="setting-info">
-                    <span class="setting-title">Download System</span>
-                    <small>Enable/disable the internal download system.</small>
-                    </div>
-                </div> -->
-
-                <!-- <div class="setting-item">
-                    <input type="checkbox" data-key="logSystem" id="logSystem">
-                    <div class="setting-info">
-                    <span class="setting-title">Log System</span>
-                    <small>Enable logging system.</small>
-                    </div>
-                </div> -->
-
                 <div class="setting-item">
                     <input type="checkbox" data-key="verboseLogs" id="verboseLogs">
                     <div class="setting-info">

public/script/appVersion.js

@@ -1,8 +1,21 @@
+/**
+ * Retrieves the application version from the Electron main process
+ * and displays it in the UI version badge (bottom-right corner).
+ *
+ * This is mainly used for debugging and build identification.
+ */
 async function versionLabel() {
   const appVersion = await window.electronAPI.getVersion();
 
-    // Write in front the app version for debugging (bottom right)
+    /**
-    document.getElementById("version-badge").textContent = `v${appVersion}`;
+     * UI element displaying the current application version.
-};
+     * Updated at runtime after IPC call resolves.
+     */
+    const versionBadge = document.getElementById("version-badge");
+
+    if (!versionBadge) return;
+
+    versionBadge.textContent = `${appVersion}`;
+}
 
 versionLabel();

public/script/clipboardPaste.js

@@ -1,35 +1,42 @@
-// Clipboard paste functionality for URL input
+/**
-document.addEventListener('DOMContentLoaded', () => {
+ * Initializes clipboard paste functionality for the URL input field.
-    const pasteBtn = document.getElementById('pasteBtn');
+ *
-    const urlInput = document.getElementById('UrlInput');
+ * When the user clicks the paste button, the system attempts to read
+ * the clipboard content and inject it into the URL input field.
+ * It also triggers an input event to notify any bound listeners.
+ */
+document.addEventListener("DOMContentLoaded", () => {
+  const pasteBtn = document.getElementById("pasteBtn");
+  const urlInput = document.getElementById("UrlInput");
 
-    if (pasteBtn && urlInput) {
+  if (!pasteBtn || !urlInput) return;
-        pasteBtn.addEventListener('click', async () => {
+
+  /**
+   * Handles clipboard paste action triggered by the paste button.
+   * Reads clipboard text and inserts it into the URL input field.
+   */
+  pasteBtn.addEventListener("click", async () => {
     try {
-                // Read text from clipboard
       const text = await navigator.clipboard.readText();
 
-                // Paste into the URL input
       urlInput.value = text;
 
-                // Trigger input event to ensure any listeners are notified
+      // Notify frameworks / listeners bound to input changes
-                urlInput.dispatchEvent(new Event('input', { bubbles: true }));
+      urlInput.dispatchEvent(new Event("input", { bubbles: true }));
 
-                // Optional: Focus the input
       urlInput.focus();
 
-                // Visual feedback
+      // Temporary UI feedback on paste action
-                pasteBtn.style.backgroundColor = 'var(--form-button-bg-hover-color)';
+      pasteBtn.style.backgroundColor = "var(--form-button-bg-hover-color)";
       setTimeout(() => {
-                    pasteBtn.style.backgroundColor = '';
+        pasteBtn.style.backgroundColor = "";
       }, 200);
-                
     } catch (err) {
-                console.error('Failed to read clipboard:', err);
+      console.error("Clipboard access failed:", err);
 
-                // Fallback: prompt user if clipboard API fails
+      alert(
-                alert('Unable to access clipboard. Please paste manually using Ctrl+V.');
+        "Unable to access clipboard. Please paste manually using Ctrl+V."
+      );
     }
   });
-    }
 });

public/script/custompath.js

@@ -1,9 +1,24 @@
+/**
+ * Initializes the download path system once the UI is ready.
+ *
+ * Responsibilities:
+ * - Restore last known user-selected download path (localStorage)
+ * - Validate it against backend rules
+ * - Synchronize with backend authoritative path
+ * - Setup folder selection UI interaction
+ */
 window.addEventListener("DOMContentLoaded", async () => {
   const savePathElem = document.getElementById("savePath");
   const form = document.getElementById("downloadForm");
 
-  // input caché = DERNIER chemin validé par le back
+  /**
+   * Hidden form field storing the validated download path
+   * used during download submission.
+   *
+   * Created dynamically if not already present in DOM.
+   */
   let hidden = document.getElementById("savePathInput");
+  
   if (!hidden) {
     hidden = document.createElement("input");
     hidden.type = "hidden";
@@ -12,6 +27,17 @@ window.addEventListener("DOMContentLoaded", async () => {
     form.appendChild(hidden);
   }
 
+  /**
+   * Applies a validated download path received from backend.
+   *
+   * Updates:
+   * - UI display (visible path)
+   * - tooltip (full path)
+   * - hidden form input (used for submission)
+   * - localStorage cache (UX persistence only, not authoritative)
+   *
+   * @param {string} path - validated absolute download path
+   */
   async function applyPathFromBack(path) {
     savePathElem.textContent = path;
     savePathElem.title = path; 
@@ -19,6 +45,14 @@ window.addEventListener("DOMContentLoaded", async () => {
     localStorage.setItem("customDownloadPath", path); // UX only
   }
 
+  /**
+   * Loads the initial download path on application startup.
+   *
+   * Priority order:
+   * 1. cached localStorage value (UX only, not trusted)
+   * 2. backend validated version of cached path
+   * 3. backend default fallback path if validation fails
+   */
   async function loadInitialPath() {
     // On affiche ce que le user a vu la dernière fois (UX)
     const cached = localStorage.getItem("customDownloadPath");
@@ -42,13 +76,16 @@ window.addEventListener("DOMContentLoaded", async () => {
 
   await loadInitialPath();
 
-  document
+  /**
-    .getElementById("changePath")
+   * Opens system folder selector and updates download path.
-    .addEventListener("click", async () => {
+   *
+   * The selected folder is validated by Electron backend
+   * before being applied to the UI and persisted.
+   */
+  document.getElementById("changePath").addEventListener("click", async () => {
       try {
         // selectDownloadFolder already returns a validated path
-        const validatedPath =
+        const validatedPath = await window.electronAPI.selectDownloadFolder();
-          await window.electronAPI.selectDownloadFolder();
 
         if (!validatedPath) return; // cancelled
 

public/script/customthemes.js

@@ -1,6 +1,22 @@
 const themeSelect = document.getElementById("themeSelect");
+/**
+ * Currently selected themes loaded from backend.
+ * Used as cache for UI theme switching.
+ */
 let loadedThemes = [];
 
+/**
+ * Applies a theme object to the application UI by mapping
+ * theme configuration values to CSS variables and DOM properties.
+ *
+ * This function mutates:
+ * - document.body (background styling)
+ * - :root CSS variables (design system tokens)
+ * - subtitle DOM element (theme metadata display)
+ *
+ * @param {Object} theme - Theme definition object
+ * @param {Object} theme.style - Style configuration
+ */
 function applyTheme(theme) {
   const root = document.documentElement;
   const style = theme.style;
@@ -15,72 +31,75 @@ function applyTheme(theme) {
     document.body.style.backgroundImage = "";
   }
 
-  // Colors
+  // CSS variables (design tokens)
-  root.style.setProperty("--background-color",          style.colors?.background || "");
+  root.style.setProperty("--background-color", style.colors?.background || "#121212");
-  root.style.setProperty("--default-text-color",        style.colors?.text?.default || "");
+  root.style.setProperty("--default-text-color", style.colors?.text?.default || "#e0e0e0");
-  root.style.setProperty("--subtitle-color",            style.colors?.text?.subtitle || "");
+  root.style.setProperty("--subtitle-color", style.colors?.text?.subtitle || "#2196f3");
-  root.style.setProperty("--audio-only-label-color",    style.colors?.text?.audioOnly || "");
+  root.style.setProperty("--audio-only-label-color", style.colors?.text?.audioOnly || "#f5f5f5");
 
-  // Form
+  root.style.setProperty("--form-bg-color", style.form?.background || "#1e1e1e");
-  root.style.setProperty("--form-bg-color",                   style.form?.background || "");
+  root.style.setProperty("--form-input-bg-color", style.form?.input?.background || "#2a2a2a");
-  root.style.setProperty("--form-input-bg-color",             style.form?.input?.background || "");
+  root.style.setProperty("--form-input-border-color", style.form?.input?.border || "#444444");
-  root.style.setProperty("--form-input-border-color",         style.form?.input?.border || "");
+  root.style.setProperty("--form-input-border-focus-color", style.form?.input?.borderFocus || "#2196f3");
-  root.style.setProperty("--form-input-border-focus-color",   style.form?.input?.borderFocus || "");
+  root.style.setProperty("--form-input-text-color", style.form?.input?.text || "#f5f5f5");
-  root.style.setProperty("--form-input-text-color",           style.form?.input?.text || "");
+  root.style.setProperty("--form-input-placeholder-color", style.form?.input?.placeholder || "#888888");
-  root.style.setProperty("--form-input-placeholder-color",    style.form?.input?.placeholder || "");
+  root.style.setProperty("--form-button-bg-color", style.form?.button?.background || "#2196f3");
-  root.style.setProperty("--form-button-bg-color",            style.form?.button?.background || "");
+  root.style.setProperty("--form-button-text-color", style.form?.button?.text || "#ffffff");
-  root.style.setProperty("--form-button-text-color",          style.form?.button?.text || "");
+  root.style.setProperty("--form-button-bg-hover-color", style.form?.button?.hover || "#1976d2");
-  root.style.setProperty("--form-button-bg-hover-color",      style.form?.button?.hover || "");
+  root.style.setProperty("--paste-button-icon-color", style.form?.pasteButtonIcon || "#ffffff");
-  root.style.setProperty("--paste-button-icon-color",         style.form?.pasteButtonIcon || "");
 
-  // Checkbox
+  root.style.setProperty("--checkbox-unchecked-bg-color", style.checkbox?.background?.unchecked || "#555555");
-  root.style.setProperty("--checkbox-unchecked-bg-color",       style.checkbox?.background?.unchecked || "");
+  root.style.setProperty("--checkbox-checked-bg-color", style.checkbox?.background?.checked || "#2196f3");
-  root.style.setProperty("--checkbox-checked-bg-color",         style.checkbox?.background?.checked || "");
+  root.style.setProperty("--checkbox-checkmark-border-color", style.checkbox?.checkmarkBorder || "#ffffff");
-  root.style.setProperty("--checkbox-checkmark-border-color",   style.checkbox?.checkmarkBorder || "");
+  root.style.setProperty("--checkbox-pulse-color", style.checkbox?.pulse || "rgba(33, 150, 243, 0.5)");
-  root.style.setProperty("--checkbox-pulse-color",              style.checkbox?.pulse || "");
 
-  // Download
+  root.style.setProperty("--download-status-color", style.download?.status || "#2196f3");
-  root.style.setProperty("--download-status-color", style.download?.status || "");
 
-  // Progress bar
+  root.style.setProperty("--progress-bar-bg-color", style.progressBar?.background || "#444444");
-  root.style.setProperty("--progress-bar-bg-color",   style.progressBar?.background || "");
+  root.style.setProperty("--progress-bar-fill-color", style.progressBar?.fill || "#2196f3");
-  root.style.setProperty("--progress-bar-fill-color", style.progressBar?.fill || "");
 
-  // Video info
+  root.style.setProperty("--video-info-bg-color", style.videoInfo?.background || "#1a1a1a");
-  root.style.setProperty("--video-info-bg-color",          style.videoInfo?.background || "");
+  root.style.setProperty("--video-info-text-color", style.videoInfo?.text || "#e0e0e0");
-  root.style.setProperty("--video-info-text-color",        style.videoInfo?.text || "");
+  root.style.setProperty("--video-info-heading-color", style.videoInfo?.heading || "#2196f3");
-  root.style.setProperty("--video-info-heading-color",     style.videoInfo?.heading || "");
+  root.style.setProperty("--video-info-list-color", style.videoInfo?.list || "#cccccc");
-  root.style.setProperty("--video-info-list-color",        style.videoInfo?.list || "");
+  root.style.setProperty("--video-info-list-strong-color", style.videoInfo?.strong || "#ffffff");
-  root.style.setProperty("--video-info-list-strong-color", style.videoInfo?.strong || "");
+  root.style.setProperty("--video-info-link-color", style.videoInfo?.link || "#2196f3");
-  root.style.setProperty("--video-info-link-color",        style.videoInfo?.link || "");
+  root.style.setProperty("--video-info-link-hover-color", style.videoInfo?.linkHover || "#1976d2");
-  root.style.setProperty("--video-info-link-hover-color",  style.videoInfo?.linkHover || "");
 
-  // Playlist
+  root.style.setProperty("--playlist-background-color", style.playlist?.background || "#303030");
-  root.style.setProperty("--playlist-background-color", style.playlist?.background || "");
 
-  // Settings
+  root.style.setProperty("--settings-button-bg-color", style.settings?.button?.background || "#1e1e1e");
-  root.style.setProperty("--settings-button-bg-color",      style.settings?.button?.background || "");
+  root.style.setProperty("--settings-button-text-color", style.settings?.button?.text || "#e0e0e0");
-  root.style.setProperty("--settings-button-text-color",    style.settings?.button?.text || "");
+  root.style.setProperty("--open-theme-button-bg-color", style.settings?.openThemeButton?.background || "#2196f3");
-  root.style.setProperty("--open-theme-button-bg-color",    style.settings?.openThemeButton?.background || "");
+  root.style.setProperty("--open-theme-button-text-color", style.settings?.openThemeButton?.text || "#ffffff");
-  root.style.setProperty("--open-theme-button-text-color",  style.settings?.openThemeButton?.text || "");
+  root.style.setProperty("--open-json-button-bg-color", style.settings?.openJsonButton?.background || style.settings?.button?.background || "#1e1e1e");
-  root.style.setProperty("--open-json-button-bg-color",     style.settings?.openJsonButton?.background || style.settings?.button?.background || "");
+  root.style.setProperty("--open-json-button-text-color", style.settings?.openJsonButton?.text || style.settings?.button?.text || "#e0e0e0");
-  root.style.setProperty("--open-json-button-text-color",   style.settings?.openJsonButton?.text || style.settings?.button?.text || "");
+  root.style.setProperty("--settings-modal-bg-color", style.settings?.background?.modal || "#1e1e1e");
-  root.style.setProperty("--settings-modal-bg-color",       style.settings?.background?.modal || "");
+  root.style.setProperty("--settings-section-bg-color", style.settings?.background?.section || "#2a2a2a");
-  root.style.setProperty("--settings-section-bg-color",     style.settings?.background?.section || "");
+  root.style.setProperty("--settings-text-color", style.settings?.text || "#e0e0e0");
-  root.style.setProperty("--settings-text-color",           style.settings?.text || "");
+  root.style.setProperty("--settings-subtitle-color", style.settings?.subtitle || "#aaaaaa");
-  root.style.setProperty("--settings-subtitle-color",       style.settings?.subtitle || "");
 
-  // Subtitle
   const subtitleEl = document.getElementById("subtitle");
   if (subtitleEl) subtitleEl.textContent = theme.subtitle || theme.name;
 }
 
+/**
+ * Persists selected theme ID into Electron backend features storage.
+ *
+ * @param {string} themeId
+ */
 function saveTheme(themeId) {
   window.electronAPI.setFeature("theme", themeId);
 }
 
+/**
+ * Populates theme dropdown selector with available themes.
+ *
+ * @param {Array} themes
+ */
 function populateThemeSelect(themes) {
   themeSelect.innerHTML = "";
+
   for (const theme of themes) {
     const option = document.createElement("option");
     option.value = theme.id;
@@ -89,35 +108,143 @@ function populateThemeSelect(themes) {
   }
 }
 
+/**
+ * Initializes theme system:
+ * - loads themes from backend
+ * - restores saved theme
+ * - applies selected theme
+ */
 async function initThemes() {
   loadedThemes = await window.electronAPI.getThemes();
 
-  if (!loadedThemes.length) return;
+  if (!loadedThemes.length) {
+    const defaultTheme = {
+      id: "dark",
+      name: "Dark",
+      subtitle: "Darkness is my ally",
+      style: {
+        background: {
+          size: "cover",
+          position: "center",
+          attachment: "fixed"
+        },
+
+        colors: {
+          background: "#121212",
+          text: {
+            default: "#e0e0e0",
+            subtitle: "#2196f3",
+            audioOnly: "#f5f5f5"
+          }
+        },
+
+        form: {
+          background: "#1e1e1e",
+          input: {
+            background: "#2a2a2a",
+            border: "#444444",
+            borderFocus: "#2196f3",
+            text: "#f5f5f5",
+            placeholder: "#888888"
+          },
+          button: {
+            background: "#2196f3",
+            text: "#ffffff",
+            hover: "#1976d2"
+          },
+          pasteButtonIcon: "#ffffff"
+        },
+
+        checkbox: {
+          background: {
+            unchecked: "#555555",
+            checked: "#2196f3"
+          },
+          checkmarkBorder: "#ffffff",
+          pulse: "rgba(33, 150, 243, 0.5)"
+        },
+
+        download: {
+          status: "#2196f3"
+        },
+
+        progressBar: {
+          background: "#444444",
+          fill: "#2196f3"
+        },
+
+        videoInfo: {
+          background: "#1a1a1a",
+          text: "#e0e0e0",
+          heading: "#2196f3",
+          list: "#cccccc",
+          strong: "#ffffff",
+          link: "#2196f3",
+          linkHover: "#1976d2"
+        },
+
+        playlist: {
+          background: "#303030"
+        },
+
+        settings: {
+          button: {
+            background: "#1e1e1e",
+            text: "#e0e0e0"
+          },
+          openThemeButton: {
+            background: "#2196f3",
+            text: "#ffffff"
+          },
+          openJsonButton: {
+            background: "#2196f3",
+            text: "#ffffff"
+          },
+          background: {
+            modal: "#1e1e1e",
+            section: "#2a2a2a"
+          },
+          text: "#e0e0e0",
+          subtitle: "#aaaaaa"
+        }
+      }
+    };
+
+    loadedThemes = [defaultTheme];
+  }
 
   populateThemeSelect(loadedThemes);
 
   const features = await window.electronAPI.getFeatures();
   const savedId = features.theme;
+
   const theme = loadedThemes.find(t => t.id === savedId) || loadedThemes[0];
 
   themeSelect.value = theme.id;
   applyTheme(theme);
 }
 
+/**
+ * Handles theme selection change from UI dropdown.
+ */
 themeSelect.addEventListener("change", (e) => {
   const theme = loadedThemes.find(t => t.id === e.target.value);
-  if (theme) {
+  if (!theme) return;
+
   applyTheme(theme);
   saveTheme(theme.id);
-  }
 });
 
+/**
+ * Reloads themes from backend and reapplies current selection.
+ */
 async function refreshThemes() {
   loadedThemes = await window.electronAPI.reloadThemes();
   populateThemeSelect(loadedThemes);
 
   const features = await window.electronAPI.getFeatures();
   const savedId = features.theme;
+
   const theme = loadedThemes.find(t => t.id === savedId) || loadedThemes[0];
 
   themeSelect.value = theme.id;

public/script/downloadstatus.js

@@ -2,9 +2,35 @@ const form = document.getElementById("downloadForm");
 const statusDiv = document.getElementById("downloadStatus");
 const button = form.querySelector("button[type=\"submit\"]");
 const stopBtn = document.getElementById("stopBtn");
+
+/**
+ * Indicates whether a download process is currently active.
+ * Used to prevent duplicate submissions and to gate UI actions
+ * such as disabling the form or showing progress.
+ */
 let isDownloading = false;
+
+/**
+ * Indicates whether the current download was explicitly
+ * stopped by the user via the cancel action.
+ *
+ * Used to differentiate between:
+ * - user-initiated cancellation
+ * - failures or natural completion
+ */
 let userStoppedDownload = false;
 
+
+
+/**
+ * Handles download form submission.
+ *
+ * - Validates user input (URL)
+ * - Disables UI during download
+ * - Sends request to backend `/download`
+ * - Manages success / error states
+ * - Restores UI state after completion
+ */
 form.addEventListener("submit", async (e) => {
   e.preventDefault();
   
@@ -61,6 +87,13 @@ form.addEventListener("submit", async (e) => {
   }
 });
 
+/**
+ * Displays initial download progress UI immediately
+ * when a download starts.
+ *
+ * Initializes progress bar, speed indicator, stage text
+ * and shows the stop button.
+ */
 function showInitialProgress() {
   const progressWrapper = document.getElementById("downloadProgressWrapper");
   const progressBarText = document.getElementById("downloadProgressText");
@@ -84,6 +117,14 @@ function showInitialProgress() {
   if (stopBtn) stopBtn.style.display = "inline-flex";
 }
 
+/**
+ * Cancels the current download process.
+ *
+ * Sends a request to backend `/download/cancel`,
+ * updates UI state and resets progress indicators.
+ *
+ * Prevents duplicate calls if no download is active.
+ */
 async function stopDownload() {
   if (!isDownloading) return;
 
@@ -109,6 +150,12 @@ async function stopDownload() {
   }
 }
 
+/**
+ * Resets all download progress UI elements to their
+ * default hidden state.
+ *
+ * Used after completion or cancellation of a download.
+ */
 function resetProgressBar() {
   const progressWrapper = document.getElementById("downloadProgressWrapper");
   if (progressWrapper) progressWrapper.style.display = "none";

public/script/fetchinfo.js

@@ -1,12 +1,33 @@
+/**
+ * Converts a raw upload date string (format YYYYMMDD)
+ * into a human-readable format (DD/MM/YYYY).
+ *
+ * Returns "Inconnue" if the input is invalid or malformed.
+ */
 function formatDate(dateStr) {
   if (!dateStr || dateStr.length !== 8) return "Inconnue";
   return `${dateStr.slice(6,8)}/${dateStr.slice(4,6)}/${dateStr.slice(0,4)}`;
 }
 
+/**
+ * Converts a file size in bytes into megabytes (MB).
+ *
+ * Returns a formatted string with 2 decimals (e.g. "12.34 Mo").
+ * If input is falsy, returns "Inconnue".
+ */
 function formatSize(bytes) {
   return bytes ? (bytes / (1024*1024)).toFixed(2) + " Mo" : "Inconnue";
 }
 
+/**
+ * Fetches video or playlist metadata from the backend `/info` endpoint.
+ *
+ * Sends a POST request with URL-encoded body.
+ * Handles network errors, HTTP errors and JSON parsing safely.
+ *
+ * @param {string} url - Video or playlist URL
+ * @returns {Promise<Object>} Parsed metadata or error object
+ */
 async function fetchVideoInfo(url) {
   try {
     const res = await fetch("/info", {
@@ -26,9 +47,19 @@ async function fetchVideoInfo(url) {
   }
 }
 
-
+/**
+ * Initializes the video info system UI.
+ *
+ * - Listens to URL input changes
+ * - Automatically fetches video/playlist metadata if enabled
+ * - Renders either playlist UI or single video UI
+ * - Handles loading states and caching (lastFetchedUrl)
+ *
+ * Also manages dynamic playlist title injection into the form.
+ */
 async function init() {
 
+  // Main input listener: triggers auto-fetch when URL changes
   document.addEventListener("DOMContentLoaded", () => {
     const urlInput = document.getElementById("UrlInput");
     const infoDiv = document.getElementById("videoInfo");

public/script/progressBar.js

@@ -1,32 +1,53 @@
+/**
+ * DOM elements used for download progress UI rendering.
+ * These elements are updated in real-time via SSE streams.
+ */
 const progressWrapper = document.getElementById("downloadProgressWrapper");
 const progressBar = document.getElementById("downloadProgress");
-const progressBarText = document.getElementById("downloadProgressText")
+const progressBarText = document.getElementById("downloadProgressText");
 
 const speedElement = document.getElementById("downloadSpeedText");
 const stageElement = document.getElementById("downloadStage");
 const playlistInfoElement = document.getElementById("playlistInfoText");
+
+/**
+ * Server-Sent Events streams for real-time download updates.
+ * Each stream is responsible for a specific aspect of the download state.
+ */
 const speedEvt = new EventSource("/download/speed");
 const stageEvt = new EventSource("/download/stage");
 const playlistInfoEvt = new EventSource("/download/playlist-info");
 
+/**
+ * Resets the progress UI to its initial state.
+ * Hides all dynamic elements and clears displayed values.
+ */
 function startProgress() {
   progressBar.style.width = "0%";
   progressBarText.innerHTML = "0%";
   speedElement.innerHTML = "0 Mib/s";
 }
 
+/**
+ * Makes the progress UI visible and enables related controls
+ * such as the stop button.
+ */
 function showProgress() {
   progressWrapper.style.display = "block";
   progressBarText.style.display = "block";
   speedElement.style.display = "block";
 
-  // Show stop button
   const stopBtn = document.getElementById("stopBtn");
   if (stopBtn) stopBtn.style.display = "inline-flex";
 }
 
+/**
+ * Updates the progress bar UI with the given percentage.
+ * Automatically triggers UI visibility if not already shown.
+ *
+ * @param {number} percent - Download progress percentage (0–100)
+ */
 function updateProgress(percent) {
-  // Show progress div and stop button only when percent > 0
   if (percent > 0 && progressWrapper.style.display !== "block") {
     showProgress();
   }
@@ -35,6 +56,10 @@ function updateProgress(percent) {
   progressBarText.innerHTML = `${percent}%`;
 }
 
+/**
+ * Fully resets the progress UI and hides all download indicators.
+ * Called after completion or cancellation.
+ */
 function resetProgress() {
   progressBar.style.width = "0%";
   progressBarText.textContent = "";
@@ -50,13 +75,19 @@ function resetProgress() {
   playlistInfoElement.textContent = "";
   playlistInfoElement.style.display = "none";
 
-  // Hide stop button
   const stopBtn = document.getElementById("stopBtn");
   if (stopBtn) stopBtn.style.display = "none";
 }
 
-// SSE Connexion
+/**
+ * Main SSE stream handling download progress updates.
+ * Supports:
+ * - reset signal
+ * - done signal
+ * - percentage updates
+ */
 const evtSource = new EventSource("/download/progress");
+
 evtSource.onmessage = e => {
   if (e.data === "reset") {
     startProgress();
@@ -65,11 +96,10 @@ evtSource.onmessage = e => {
   }
 
   if (e.data === "done") {
-    // Keep progress bar visible for better UX, let toast handle the feedback
     setTimeout(() => {
       resetProgress();
       window.electronAPI.setProgress(-1);
-    }, 2000); // Wait 2s so user sees 100% progress
+    }, 2000);
     return;
   }
 
@@ -77,22 +107,30 @@ evtSource.onmessage = e => {
 
   if (!isNaN(percent)) {
     updateProgress(percent);
-    window.electronAPI.setProgress(percent); // Update Task Bar
+    window.electronAPI.setProgress(percent);
-    // Don't hide at 100%, wait for "done" signal instead
   }
 };
 
+/**
+ * SSE stream: download speed updates (e.g. "5.2 MiB/s").
+ */
 speedEvt.onmessage = e => {
   speedElement.style.display = "block";
-  speedElement.textContent = e.data; // ex: "5.2MiB/s"
+  speedElement.textContent = e.data;
 };
 
+/**
+ * SSE stream: download stage updates (e.g. downloading, merging, extracting).
+ */
 stageEvt.onmessage = e => {
   stageElement.style.display = "block";
-  stageElement.textContent = e.data; // ex: "📥 Downloading..."
+  stageElement.textContent = e.data;
 };
 
+/**
+ * SSE stream: playlist progress updates (e.g. "Item 1 of 15").
+ */
 playlistInfoEvt.onmessage = e => {
   playlistInfoElement.style.display = "block";
-  playlistInfoElement.textContent = e.data; // ex: "Item 1 of 15"
+  playlistInfoElement.textContent = e.data;
 };

public/script/settingsPanel.js

@@ -1,26 +1,48 @@
+/**
+ * Settings panel DOM elements used to control application feature flags
+ * and configuration UI interactions.
+ */
 const settingsPanel = document.getElementById("settings-panel");
 const settingsModal = document.querySelector(".settings-modal");
-
 const settingsButton = document.getElementById("settings-button");
 
+/**
+ * Tracks current settings panel state.
+ * NOTE: actual visibility is derived from DOM style in current implementation.
+ */
 let isOpen = false;
 
+/**
+ * Toggles visibility of the settings panel when clicking the settings button.
+ */
 settingsButton.addEventListener("click", () => {
-    const isOpen = settingsPanel.style.display === "block";
+  const currentlyOpen = settingsPanel.style.display === "block";
-    settingsPanel.style.display = isOpen ? "none" : "block";
+  settingsPanel.style.display = currentlyOpen ? "none" : "block";
 });
 
+/**
+ * Closes the settings panel and resets internal state.
+ */
 function closePanel() {
   isOpen = false;
   settingsPanel.style.display = "none";
 }
 
-
+/**
+ * Loads feature flags from Electron backend and syncs them
+ * with corresponding UI controls (checkboxes, selects).
+ *
+ * Also registers change listeners to persist updates in real time.
+ */
 async function loadSettings() {
   const features = await window.electronAPI.getFeatures();
 
-  document.querySelectorAll(".settings-section input, .settings-section select").forEach(el => {
+  document
+    .querySelectorAll(".settings-section input, .settings-section select")
+    .forEach((el) => {
       const key = el.dataset.key;
+      if (!key) return;
+
       if (features[key] !== undefined) {
         if (el.type === "checkbox") el.checked = features[key];
         else if (el.tagName === "SELECT") el.value = features[key];
@@ -28,24 +50,34 @@ async function loadSettings() {
 
       el.addEventListener("change", () => {
         if (key === "theme") return;
-      let value = el.type === "checkbox" ? el.checked : el.value;
+
+        const value = el.type === "checkbox" ? el.checked : el.value;
         window.electronAPI.setFeature(key, value);
       });
     });
 }
 
-// Open The JSON
+/**
-document.getElementById("open-json-btn").addEventListener("click", () => {
+ * Opens configuration JSON file via Electron topbar API.
+ */
+document.getElementById("open-json-btn")
+  ?.addEventListener("click", () => {
     window.topbarAPI.openConfig();
   });
 
-// Open Theme Folder
+/**
-document.getElementById("open-theme").addEventListener("click", () => {
+ * Opens theme directory via Electron topbar API.
+ */
+document.getElementById("open-theme")
+  ?.addEventListener("click", () => {
     window.topbarAPI.openTheme();
   });
 
-// Refresh Themes
+/**
-document.getElementById("refresh-themes-btn").addEventListener("click", function() {
+ * Refreshes theme list and updates UI selector with a short animation.
+ */
+document.getElementById("refresh-themes-btn")
+  ?.addEventListener("click", function () {
     this.classList.add("spinning");
     window.refreshThemes();
 
@@ -54,13 +86,20 @@ document.getElementById("refresh-themes-btn").addEventListener("click", function
     }, 600);
   });
 
+/**
+ * Clicking the overlay outside the modal closes the settings panel.
+ */
+settingsPanel?.addEventListener("click", closePanel);
 
-/* clic sur l'overlay = fermer */
+/**
-settingsPanel.addEventListener("click", closePanel);
+ * Prevents modal clicks from closing the settings panel
-
+ * by stopping event propagation to the overlay.
-/* clic dans la modal = stop propagation */
+ */
-settingsModal.addEventListener("click", (e) => {
+settingsModal?.addEventListener("click", (e) => {
   e.stopPropagation();
 });
 
+/**
+ * Initializes settings UI by loading backend feature flags.
+ */
 loadSettings();

public/script/toast.js

@@ -1,17 +1,26 @@
-window.showToast = function(message, type = 'info', duration = 4000) {
+/**
-  const container = document.getElementById('toast-container');
+ * Displays a toast notification in the global UI container.
-  if (!container) return;
+ *
+ * Toasts are automatically appended to `#toast-container`,
+ * support multiple visual types, and can auto-dismiss after a delay.
+ *
+ * @param {string} message - Message displayed inside the toast
+ * @param {"success"|"error"|"warning"|"info"} [type="info"] - Visual style of the toast
+ * @param {number} [duration=4000] - Auto-dismiss delay in milliseconds (0 disables auto removal)
+ * @returns {HTMLElement|null} The created toast element or null if container is missing
+ */
+window.showToast = function (message, type = "info", duration = 4000) {
+  const container = document.getElementById("toast-container");
+  if (!container) return null;
 
-  // Create toast element
+  const toast = document.createElement("div");
-  const toast = document.createElement('div');
+  toast.classList.add("toast", type);
-  toast.classList.add('toast', type);
 
-  // Icons for different types
   const icons = {
-    success: '✓',
+    success: "✓",
-    error: '✕',
+    error: "✕",
-    warning: '⚠',
+    warning: "⚠",
-    info: 'ℹ'
+    info: "ℹ"
   };
 
   const icon = icons[type] || icons.info;
@@ -22,14 +31,11 @@ window.showToast = function(message, type = 'info', duration = 4000) {
     <button class="toast-close" title="Close">×</button>
   `;
 
-  // Add close functionality
+  const closeBtn = toast.querySelector(".toast-close");
-  const closeBtn = toast.querySelector('.toast-close');
+  closeBtn.addEventListener("click", () => removeToast(toast));
-  closeBtn.addEventListener('click', () => removeToast(toast));
 
-  // Add to container
   container.appendChild(toast);
 
-  // Auto remove after duration
   if (duration > 0) {
     setTimeout(() => removeToast(toast), duration);
   }
@@ -37,18 +43,41 @@ window.showToast = function(message, type = 'info', duration = 4000) {
   return toast;
 };
 
+/**
+ * Removes a toast element with a small exit animation.
+ *
+ * @param {HTMLElement} toast
+ */
 function removeToast(toast) {
-  if (!toast.parentElement) return;
+  if (!toast?.parentElement) return;
+
+  toast.classList.add("removing");
 
-  toast.classList.add('removing');
   setTimeout(() => {
-    if (toast.parentElement) {
     toast.remove();
-    }
   }, 300);
 }
 
-window.showSuccess = (message, duration = 4000) => window.showToast(message, 'success', duration);
+/**
-window.showError = (message, duration = 5000) => window.showToast(message, 'error', duration);
+ * Shortcut: success toast
-window.showWarning = (message, duration = 4000) => window.showToast(message, 'warning', duration);
+ */
-window.showInfo = (message, duration = 4000) => window.showToast(message, 'info', duration);
+window.showSuccess = (message, duration = 4000) =>
+  window.showToast(message, "success", duration);
+
+/**
+ * Shortcut: error toast
+ */
+window.showError = (message, duration = 5000) =>
+  window.showToast(message, "error", duration);
+
+/**
+ * Shortcut: warning toast
+ */
+window.showWarning = (message, duration = 4000) =>
+  window.showToast(message, "warning", duration);
+
+/**
+ * Shortcut: info toast
+ */
+window.showInfo = (message, duration = 4000) =>
+  window.showToast(message, "info", duration);

public/script/topbar.js

@@ -1,16 +1,22 @@
-// Ajout des listeners pour la topbar
+/**
+ * Initializes topbar button event listeners and binds them
+ * to the Electron preload API exposed in `window.topbarAPI`.
+ *
+ * This function is safe to call once DOM is ready.
+ * It silently aborts if the API or elements are missing.
+ */
 function setupTopbarListeners() {
   const { topbarAPI } = window;
   if (!topbarAPI) return;
 
-  const minBtn = document.getElementById('minimize-btn');
+  const minBtn = document.getElementById("minimize-btn");
-  const maxBtn = document.getElementById('maximize-btn');
+  const maxBtn = document.getElementById("maximize-btn");
-  const closeBtn = document.getElementById('close-btn');
+  const closeBtn = document.getElementById("close-btn");
-  const devtoolsBtn = document.getElementById('devtools-btn');
+  const devtoolsBtn = document.getElementById("devtools-btn");
-  const logsBtn = document.getElementById('logs-btn');
+  const logsBtn = document.getElementById("logs-btn");
-  const websiteBtn = document.getElementById('website-btn');
+  const websiteBtn = document.getElementById("website-btn");
-  const wikiBtn = document.getElementById('wiki-btn');
+  const wikiBtn = document.getElementById("wiki-btn");
-  const workshopBtn = document.getElementById('workshop-btn');
+  const workshopBtn = document.getElementById("workshop-btn");
 
   if (minBtn) minBtn.onclick = () => topbarAPI.minimize();
   if (maxBtn) maxBtn.onclick = () => topbarAPI.maximize();
@@ -22,12 +28,30 @@ function setupTopbarListeners() {
   if (workshopBtn) workshopBtn.onclick = () => topbarAPI.openWorkshop();
 }
 
-document.addEventListener('DOMContentLoaded', setupTopbarListeners);
+/**
+ * Registers topbar event listeners after DOM is fully loaded.
+ */
+document.addEventListener("DOMContentLoaded", setupTopbarListeners);
 
+/**
+ * Applies UI layout adjustments depending on feature flags
+ * provided by the Electron backend.
+ *
+ * Specifically handles:
+ * - hiding custom topbar
+ * - adjusting layout spacing
+ * - repositioning theme switcher
+ */
+(async function applyFeatureLayout() {
   const features = await window.electronAPI.getFeatures();
 
   if (!features.customTopBar) {
-  document.getElementById("topbar").style.display = "none"; 
+    const topbar = document.getElementById("topbar");
-  document.getElementById("container").style.marginTop = "0";
+    const container = document.getElementById("container");
-  document.getElementById("theme-switcher").style.top = "30px";  
+    const themeSwitcher = document.getElementById("theme-switcher");
+
+    if (topbar) topbar.style.display = "none";
+    if (container) container.style.marginTop = "0";
+    if (themeSwitcher) themeSwitcher.style.top = "30px";
   }
+})();

public/styles/layout/form.css

@@ -40,8 +40,7 @@ form button:hover {
 form#downloadForm {
     display: flex;
     gap: 0.5em;
-    max-width: 600px;
+    width: 350px;
-    width: 100%;
     justify-content: center;
 }
 

server/controller/download.controller.js

@@ -4,11 +4,47 @@ const { isValidUrl, isSafePath } = require("../helpers/validation.helpers");
 const { notifyDownloadFinished } = require("../helpers/notify.helpers");
 const { configFeatures } = require("../../config");
 
-const listeners = [];
+/**
-const speedListeners = [];
+ * Active Server-Sent Event subscribers receiving
-const stageListeners = [];
+ * download progress updates.
-const playlistInfoListeners = [];
+ *
+ * Each listener receives a percentage value between
+ * 0 and 100 during the download lifecycle.
+ */
+const progressListeners = [];
 
+/**
+ * Active Server-Sent Event subscribers receiving
+ * download speed updates.
+ */
+const speedListeners = [];
+
+/**
+ * Active Server-Sent Event subscribers receiving
+ * download stage updates.
+ */
+const stageListeners = [];
+
+/**
+ * Active Server-Sent Event subscribers receiving
+ * playlist progress information.
+ */
+const playlistListeners = [];
+
+/**
+ * Handles download requests and starts a yt-dlp download.
+ *
+ * Validates user input, prepares download options and
+ * delegates the download process to the download service.
+ *
+ * Once the download completes successfully, a desktop
+ * notification may be displayed depending on the
+ * application configuration.
+ *
+ * @param {import("express").Request} req
+ * @param {import("express").Response} res
+ * @returns {Promise<void>}
+ */
 async function downloadController(req, res) {
   try {
     const options = {
@@ -25,17 +61,30 @@ async function downloadController(req, res) {
       return res.status(400).send("Save Path Not Allowed.");
     }
 
-    // Get output folder when the download is finished
+    const outputFolder = await fetchDownload(
-    const outputFolder = await fetchDownload(options, listeners, speedListeners, stageListeners, playlistInfoListeners);
+      options,
+      progressListeners,
+      speedListeners,
+      stageListeners,
+      playlistListeners
+    );
+    
     notifyDownloadFinished(outputFolder, configFeatures.notifySystem);
     res.send("Download Done !");
     
   } catch (err) {
-    logger.error(`Server Error in /download : ${err.message}`);
+    logger.error(`Server Error in /download: ${err?.message ?? err}`);
-    res.status(500).send(`Server Error`);
+    res.status(500).send("Server Error");
   }
 }
 
+/**
+ * Opens a Server-Sent Events (SSE) connection used to
+ * stream download progress updates to the client.
+ *
+ * @param {import("express").Request} req
+ * @param {import("express").Response} res
+ */
 function progressController(req, res) {
   res.set({
     'Content-Type': 'text/event-stream',
@@ -44,14 +93,21 @@ function progressController(req, res) {
   });
 
   const sendProgress = percent => res.write(`data: ${percent}\n\n`);
-  listeners.push(sendProgress);
+  progressListeners.push(sendProgress);
 
   req.on('close', () => {
-    listeners.splice(listeners.indexOf(sendProgress), 1);
+    progressListeners.splice(progressListeners.indexOf(sendProgress), 1);
     res.end();
   });
 }
 
+/**
+ * Opens a Server-Sent Events (SSE) connection used to
+ * stream download speed updates to the client.
+ *
+ * @param {import("express").Request} req
+ * @param {import("express").Response} res
+ */
 function speedController(req, res) {
   res.set({
     'Content-Type': 'text/event-stream',
@@ -68,6 +124,14 @@ function speedController(req, res) {
   });
 }
 
+/**
+ * Opens a Server-Sent Events (SSE) connection used to
+ * stream download stage updates such as downloading,
+ * merging, extracting audio or embedding metadata.
+ *
+ * @param {import("express").Request} req
+ * @param {import("express").Response} res
+ */
 function stageController(req, res) {
   res.set({
     'Content-Type': 'text/event-stream',
@@ -84,6 +148,14 @@ function stageController(req, res) {
   });
 }
 
+/**
+ * Cancels the currently running download process.
+ *
+ * Returns an error response if no download is active.
+ *
+ * @param {import("express").Request} req
+ * @param {import("express").Response} res
+ */
 function cancelDownloadController(req, res) {
   const cancelled = cancelDownload();
   if (cancelled) {
@@ -95,6 +167,18 @@ function cancelDownloadController(req, res) {
   }
 }
 
+/**
+ * Opens a Server-Sent Events (SSE) connection used to
+ * stream playlist progress information to the client.
+ *
+ * Example:
+ * - Item 1 of 20
+ * - Item 12 of 20
+ * - Item 20 of 20
+ *
+ * @param {import("express").Request} req
+ * @param {import("express").Response} res
+ */
 function playlistInfoController(req, res) {
   res.set({
     'Content-Type': 'text/event-stream',
@@ -103,10 +187,10 @@ function playlistInfoController(req, res) {
   });
 
   const sendPlaylistInfo = info => res.write(`data: ${info}\n\n`);
-  playlistInfoListeners.push(sendPlaylistInfo);
+  playlistListeners.push(sendPlaylistInfo);
 
   req.on('close', () => {
-    playlistInfoListeners.splice(playlistInfoListeners.indexOf(sendPlaylistInfo), 1);
+    playlistListeners.splice(playlistListeners.indexOf(sendPlaylistInfo), 1);
     res.end();
   });
 }

server/controller/info.controller.js

@@ -3,70 +3,114 @@ const { parseVideo, parsePlaylist } = require("../helpers/parseInfo.helpers");
 const { logger } = require("../logger");
 const { isValidUrl } = require("../helpers/validation.helpers");
 
+/**
+ * Handles metadata retrieval for a video or playlist.
+ *
+ * This controller:
+ * - Validates incoming URL (query or body)
+ * - Calls yt-dlp metadata extraction service
+ * - Detects playlist vs single video context
+ * - Applies fallback strategy if playlist extraction fails
+ * - Returns normalized parsed response (video or playlist)
+ *
+ * @param {import("express").Request} req
+ * @param {import("express").Response} res
+ */
 async function infoController(req, res) {
 
-    const url = req.body.url || req.query.url; // POST et GET
+    const url = req.body.url || req.query.url; // Supports POST and GET requests
 
-
+    /**
-    // If no url, non-string url or invalid url
+     * Basic validation:
-
+     * - URL must exist
-    if (!url || typeof url !== "string" || !isValidUrl(url)) return res.status(400).send("Invalid URL Or Missing");
+     * - Must be a string
-
+     * - Must pass custom URL validation
-    logger.info(`/Info Request receive by the Info Controller. URL: ${url}`);
+     */
-
+    if (!url || typeof url !== "string" || !isValidUrl(url)) {
-    if (url.includes("&list") || url.includes("?list")) {
+        return res.status(400).send("Invalid URL Or Missing");
-        logger.info("Estimated Data Type: Playlist")
-
-    } else{
-        logger.info("Estimated Data Type: Video")
     }
 
+    logger.info(`Info request received. URL: ${url}`);
+
+    // Lightweight heuristic to detect playlist URLs
+    const isPlaylistUrl = url.includes("&list") || url.includes("?list");
+
+    logger.info(
+        isPlaylistUrl
+            ? "Estimated Data Type: Playlist"
+            : "Estimated Data Type: Video"
+    );
+
     try {
         let data;
-    let fetchError = null;
 
+        /**
+         * Primary metadata fetch attempt
+         */
         try {
             data = await fetchInfo(url);
         } catch (err) {
-        fetchError = err;
 
-        // If it's a playlist URL and fetch failed, try fetching just the single video
+            /**
-        if ((url.includes("&list") || url.includes("?list"))) {
+             * Fallback strategy:
-            logger.info(`Playlist fetch failed: ${err.message}. Retrying with single video...`);
+             * If playlist extraction fails, retry as single video
+             */
+            if (isPlaylistUrl) {
 
-            // Remove the &list parameter
+                logger.info(
+                    `Playlist fetch failed: ${err.message}. Retrying as single video...`
+                );
+
+                // Remove playlist query parameter (best-effort cleanup)
                 const singleVideoUrl = url.split("&list")[0].split("?list")[0];
 
                 try {
                     data = await fetchInfo(singleVideoUrl);
-                logger.info(`Single video fetch succeeded after playlist failure`);
+                    logger.info("Single video fetch succeeded after playlist failure");
                 } catch (retryErr) {
-                logger.error(`Single video fetch also failed: ${retryErr.message}`);
+                    logger.error(
-                throw err; // Throw the original error
+                        `Single video fetch also failed: ${retryErr.message}`
+                    );
+
+                    // Preserve original error context
+                    throw err;
                 }
+
             } else {
                 throw err;
             }
         }
 
+        /**
+         * Normalize response based on yt-dlp output type
+         */
         if (data._type === "playlist") {
 
             const playlist = parsePlaylist(data);
-        logger.info(`Playlist : ${playlist.title} (${playlist.count} vidéos)`);
+
+            logger.info(
+                `Playlist fetched: ${playlist.title} (${playlist.count} videos)`
+            );
+
             return res.json(playlist);
 
         } else {
+
             const video = parseVideo(data);
-        logger.info(`Unique Video: ${video.title}`);
+
+            logger.info(`Video fetched: ${video.title}`);
+
             return res.json(video);
         }
 
-
     } catch (err) {
-        logger.error(`Info controller error: ${err && err.message ? err.message : err}`);
-        return res.status(500).send(`Unable to fetch info`);
-    }
 
+        logger.error(
+            `Info controller error: ${err && err.message ? err.message : err}`
+        );
+
+        return res.status(500).send("Unable to fetch info");
+    }
 }
 
 module.exports = { infoController };

server/helpers/buildArgs.helpers.js

@@ -5,6 +5,26 @@ const { ffmpegPath, denoPath} = require("./path.helpers.js");
 const { configFeatures } = require("../../config.js");
 const { logger } = require("../logger.js");
 
+/**
+ * Validates whether the provided codec is supported by the application.
+ *
+ * If the codec is supported, it is returned unchanged.
+ * Otherwise, a warning is logged and the default codec ("h264")
+ * is returned as a fallback.
+ *
+ * Supported codecs:
+ * - av01
+ * - vp9.2
+ * - vp9
+ * - h265
+ * - h264
+ * - vp8
+ * - h263
+ * - theora
+ *
+ * @param {string} codec - Codec identifier to validate.
+ * @returns {string} A valid codec identifier.
+ */
 function validateCodec(codec){
 
   const validCodec = [
@@ -20,6 +40,28 @@ function validateCodec(codec){
   }
 }
 
+/**
+ * Builds the complete yt-dlp argument list based on the
+ * application configuration and download options.
+ *
+ * The generated arguments include:
+ * - Browser cookie extraction
+ * - FFmpeg integration
+ * - Deno runtime configuration
+ * - Metadata and thumbnail embedding
+ * - Playlist handling
+ * - Video/audio format selection
+ * - Quality filtering
+ * - Output file destination
+ *
+ * @param {Object} options - Download configuration.
+ * @param {string} options.url - Video or playlist URL.
+ * @param {boolean} options.audioOnly - Whether to extract audio only.
+ * @param {string} options.quality - Requested quality preset.
+ * @param {string} options.outputFolder - Download destination folder.
+ *
+ * @returns {string[]} Array of arguments ready to be passed to yt-dlp.
+ */
 function buildYtDlpArgs({ url, audioOnly, quality, outputFolder }) {
 
   logger.info("--- CONFIGURATION ---");

server/helpers/getBrowser.helpers.js

@@ -4,10 +4,33 @@ const path = require("path");
 const notify = require("./notify.helpers")
 const { logger } = require("../logger");
 
+/**
+ * Detects the first supported browser installed on the system.
+ *
+ * The detected browser is used by yt-dlp to import authentication
+ * cookies when required by certain platforms.
+ *
+ * Currently, Firefox is the only browser officially supported
+ * by the application.
+ *
+ * If no supported browser is found:
+ * - A warning is logged
+ * - A notification is displayed to the user
+ * - "firefox" is returned as a fallback to allow yt-dlp to
+ *   handle the error gracefully without crashing the application
+ *
+ * @returns {string} The detected browser identifier.
+ */
 function getUserBrowser() {
   const userProfile = os.homedir();
 
-  // List of browsers supported by yt-dlp (Currently I can only guarantee Firefox, Sorry)
+  /**
+   * Browsers supported by yt-dlp cookie extraction.
+   *
+   * Only Firefox is currently enabled and tested.
+   * Additional browsers can be enabled in the future
+   * once compatibility has been verified.
+   */
   const browsers = [
     { name: "firefox", path: path.join(userProfile, "AppData", "Roaming", "Mozilla", "Firefox", "Profiles") },
     // { name: "chrome", path: path.join(userProfile, "AppData", "Local", "Google", "Chrome", "User Data", "Default") },
@@ -19,7 +42,7 @@ function getUserBrowser() {
     // { name: "whale", path: path.join(userProfile, "AppData", "Local", "Naver", "Naver Whale", "User Data", "Default") }
   ];
 
-  // Search for an available browser
+  // Search for the first available browser profile.
   for (const browser of browsers) {
     if (fs.existsSync(browser.path)) {
       logger.info(`Browser found: ${browser.name}`);
@@ -27,12 +50,12 @@ function getUserBrowser() {
     }
   }
 
-  // No browser found - notify user
+  // No supported browser found => Notify User
   logger.warn("No supported browser found on the system");
   notify.notifyFirefoxBrowserMissing();
   
-  // Fallback: return "Firefox" to let YT-DLP manage error
+  // Fallback to Firefox and let yt-dlp handle the error gracefully.
-  // this avoid app crash
+  // This prevents the application from crashing
   return "firefox";
 }
 

server/helpers/notify.helpers.js

@@ -1,8 +1,19 @@
 const { Notification, shell } = require("electron");
 const { iconPaths } = require("./path.helpers");
+const { logger } = require("../logger");
 
+/**
+ * Displays a system notification when a download completes successfully.
+ *
+ * If enabled, clicking the notification opens the download folder
+ * using the system file explorer.
+ *
+ * @param {string} folder - Path to the completed download folder.
+ * @param {boolean} notifyEnabled - Whether notifications are enabled in config.
+ */
 function notifyDownloadFinished(folder, notifyEnabled = true) {
   if (!notifyEnabled) return;
+  if (!folder) return;
   
   const notif = new Notification({
     title: "Freedom Loader",
@@ -14,6 +25,15 @@ function notifyDownloadFinished(folder, notifyEnabled = true) {
   notif.show();
 }
 
+/**
+ * Displays a notification when browser cookies cannot be extracted.
+ *
+ * This usually indicates:
+ * - User is not logged in to the browser
+ * - Browser profile is inaccessible
+ *
+ * Clicking the notification opens a tutorial link.
+ */
 function notifyCookiesBrowserError(){
   const notif = new Notification({
     title: "Cookies Error",
@@ -21,10 +41,23 @@ function notifyCookiesBrowserError(){
     icon: iconPaths.error,
   });
 
-  notif.on("click", () => shell.openExternal("https://youtube.com/shorts/cN9f4s1Mf88?si=519QCVd_-fzJqRf1"));
+  notif.on("click", () =>
+    shell.openExternal(
+      "https://youtube.com/shorts/cN9f4s1Mf88?si=519QCVd_-fzJqRf1"
+    )
+  );
+
   notif.show();
 }
 
+/**
+ * Displays a notification when Firefox is not detected
+ * on the user system.
+ *
+ * This is required for cookie extraction via yt-dlp.
+ *
+ * Clicking the notification opens an installation guide.
+ */
 function notifyFirefoxBrowserMissing() {
   const notif = new Notification({
     title: "Firefox Missing",
@@ -32,12 +65,17 @@ function notifyFirefoxBrowserMissing(){
     icon: iconPaths.error,
   });
 
-  notif.on("click", () => shell.openExternal("https://youtube.com/shorts/cN9f4s1Mf88?si=519QCVd_-fzJqRf1"))
+  notif.on("click", () =>
+    shell.openExternal(
+      "https://youtube.com/shorts/cN9f4s1Mf88?si=519QCVd_-fzJqRf1"
+    )
+  );
+
   notif.show();
 }
 
 module.exports = {
   notifyDownloadFinished,
   notifyCookiesBrowserError,
-  notifyFirefoxBrowserMissing
+  notifyFirefoxBrowserMissing,
 };

server/helpers/parseInfo.helpers.js

@@ -1,13 +1,24 @@
+/**
+ * Normalizes a video payload by attaching the resource type.
+ *
+ * @param {Object} data - Raw video metadata.
+ * @returns {Object} Normalized video object.
+ */
 function parseVideo(data) {
-
   return {
     type: "video",
     ...data
   };
 }
 
+/**
+ * Transforms a raw playlist payload into a normalized structure
+ * containing playlist metadata and a simplified list of videos.
+ *
+ * @param {Object} data - Raw playlist metadata.
+ * @returns {Object} Normalized playlist object.
+ */
 function parsePlaylist(data) {
-    
   return {
     type: "playlist",
     title: data.title || data.id,

server/helpers/path.helpers.js

@@ -7,21 +7,31 @@ const config = require("../../config.js");
 const { logger } = require("../logger.js");
 
 // Centralized resource paths
-const resourcesPath = config.localMode 
+const resourcesPath = config.devMode 
   ? path.join(__dirname, "../../ressources")
   : process.resourcesPath;
 
 // Default download folder (centralized)
 const defaultDownloadFolder = path.join(os.homedir(), "Downloads", "Freedom Loader");
 
-// Binary paths
+/**
+ * Runtime-resolved binary paths.
+ * These values differ between development and production builds.
+ */
+
 let userYtDlp;
 let ffmpegPath;
 let denoPath;
 
+/** Source binary bundled inside application resources (used for first-time copy) */
 const sourceYtDlp = path.join(resourcesPath, "binaries","yt-dlp.exe");
 
-if (config.localMode) {
+/**
+ * Resolve binary locations depending on environment:
+ * - dev: local resources folder
+ * - prod: extracted userData + packaged resources
+ */
+if (config.devMode) {
   userYtDlp = path.join(__dirname, "../../ressources/yt-dlp.exe");
   ffmpegPath = path.join(__dirname, "../../ressources/"); // <- has ffmpeg.exe and ffprobe.exe
   denoPath = path.join(__dirname, "../../ressources/deno.exe"); 
@@ -35,14 +45,20 @@ if (config.localMode) {
   }
 }
 
-// Notification icon paths
+/**
+ * Centralized notification and UI icon paths.
+ * Used by Electron notifications and UI components.
+ */
 const iconPaths = {
   confirm: path.join(resourcesPath, "confirm-icon.png"),
   error: path.join(resourcesPath, "error.png"),
   app: path.join(resourcesPath, "app-icon.ico")
 };
 
-// Binary paths for verification
+/**
+ * Static reference paths to bundled binaries.
+ * Used mainly for verification and diagnostics.
+ */
 const binaryPaths = {
   ytDlp: path.join(resourcesPath, "binaries", "yt-dlp.exe"),
   ffmpeg: path.join(resourcesPath, "binaries", "ffmpeg.exe"),
@@ -50,10 +66,21 @@ const binaryPaths = {
   deno: path.join(resourcesPath, "binaries", "deno.exe")
 };
 
-// Theme paths - themes stored in AppData to survive updates
+/**
+ * Theme storage system:
+ * - default themes come from app resources
+ * - user themes are persisted in userData to survive updates
+ */
 const userThemesPath = path.join(app.getPath("userData"), "themes");
 const defaultThemesSourcePath = path.join(resourcesPath, "theme");
 
+/**
+ * Initializes user theme directory and ensures default themes exist.
+ *
+ * - Creates user themes folder if missing
+ * - Copies bundled themes from resources if not present
+ * - Applies permissive permissions for runtime modification
+ */
 function initUserThemes() {
   try {
     if (!fs.existsSync(userThemesPath)) {
@@ -94,6 +121,13 @@ function initUserThemes() {
   }
 }
 
+/**
+ * Recursively copies a directory and its contents.
+ *
+ * @param {string} src - Source directory
+ * @param {string} dest - Destination directory
+ * @throws Error If copy operation fails
+ */
 function copyDirectory(src, dest) {
   try {
     if (!fs.existsSync(dest)) {
@@ -116,8 +150,9 @@ function copyDirectory(src, dest) {
   }
 }
 
-if (!userYtDlp){ logger.error("Missing YT-DLP")}
+// Runtime validation of critical binaries
-if (!ffmpegPath){ logger.error("Missing FFMPEG")}
+if (!userYtDlp){ logger.error("Missing yt-dlp binary")}
-if (!denoPath){ logger.error("Missing DENO")}
+if (!ffmpegPath){ logger.error("Missing ffmpeg binary")}
+if (!denoPath){ logger.error("Missing deno binary")}
 
 module.exports = { userYtDlp, ffmpegPath, denoPath, iconPaths, binaryPaths, resourcesPath, defaultDownloadFolder, userThemesPath, initUserThemes };

server/helpers/rateLimit.helpers.js

@@ -1,14 +1,24 @@
 const RateLimit = require("express-rate-limit");
 
 
-/* Rate Limite */
+/**
-const rateLimite = RateLimit({
+ * Rate limiter middleware used to protect public endpoints
+ * against abusive or excessive requests.
+ *
+ * Restrictions:
+ * - 5 requests per IP address
+ * - 15-minute sliding window
+ *
+ * When the limit is exceeded, a HTTP 429 (Too Many Requests)
+ * response is returned.
+ */
+const rateLimit = RateLimit({
   windowMs: 15 * 60 * 1000, // 15 minutes
-  max: 5, // limit each IP to 100 requests per windowMs on the root path
+  max: 5,
   message: "Too many requests, please try again later.",
-  statusCode: 429, // HTTP status code for "Too Many Requests"
+  statusCode: 429,
 });
 
 module.exports = {
-    rateLimite
+    rateLimit
 }

server/helpers/validation.helpers.js

@@ -1,5 +1,14 @@
 const path = require("path");
 
+/**
+ * Validates whether the provided string is a well-formed URL.
+ *
+ * The validation relies on the native URL constructor and
+ * returns `true` only if the value can be successfully parsed.
+ *
+ * @param {string} url - URL to validate.
+ * @returns {boolean} True if the URL is valid, otherwise false.
+ */
 function isValidUrl(url) {
   try {
     new URL(url);
@@ -8,13 +17,26 @@ function isValidUrl(url) {
   } catch {
     return false;
   }
-
 }
 
+/**
+ * Validates whether a folder path is considered safe for
+ * file operations.
+ *
+ * Security checks:
+ * - Rejects empty or very short paths.
+ * - Resolves the absolute path before validation.
+ * - Prevents access to sensitive Windows system directories.
+ *
+ * @param {string} folder - Folder path to validate.
+ * @returns {boolean} True if the path is considered safe, otherwise false.
+ */
 function isSafePath(folder) {
   if (!folder || folder.length < 3) return false;
+
   const unsafe = ["System32", "\\Windows"];
   const resolved = path.resolve(folder);
+
   return !unsafe.some(u => resolved.includes(u));
 }
 

server/logger.js

@@ -20,7 +20,15 @@ const logFormat = format.combine(
   format.printf(({ timestamp, level, message }) => `${timestamp} | ${level.toUpperCase()} |  ${message}`)
 );
 
-// Logger configuration
+/**
+ * Logger Instance with differents types
+ *  - info
+ *  - error
+ *  - warn 
+ * 
+ * You need to specify the text that need to be displayed
+ * @param string
+ */
 const logger = createLogger({
   level: "info",
   format: logFormat,
@@ -40,11 +48,17 @@ const logger = createLogger({
   ],
 });
 
+/**
+ * Start Log Session 
+ */
 function logSessionStart() {
   logger.info(`--- Starting session: ${new Date().toISOString()} ---`);
   logger.info(`Application Version: ${config.version}`)
 }
 
+/**
+ * Stop Log Session
+ */
 function logSessionEnd() {
   logger.info(`--- Ending session: ${new Date().toISOString()} ---`);
 }

server/server.js

@@ -2,7 +2,7 @@ const express = require("express");
 const path = require("path");
 const { logger, logSessionEnd } = require("./logger");
 const config = require("../config");
-const { rateLimite } = require("./helpers/rateLimit.helpers");
+const { rateLimit } = require("./helpers/rateLimit.helpers");
 
 const app = express();
 
@@ -14,10 +14,18 @@ app.use(express.static(path.join(__dirname, "../public")));
 // Routes
 app.use("/download", require("./routes/download.route"));
 app.use("/info",     require("./routes/info.route"));
-app.get("/", rateLimite, (req, res) => {
+app.get("/", rateLimit, (req, res) => {
   res.sendFile(path.join(__dirname, "../public/index.html"));
 });
 
+/**
+ * Initializes and starts the Express HTTP server.
+ * 
+ * - Binds the server to `config.applicationPort`
+ * - Resolves with the HTTP server instance on successful startup
+ * - Rejects on server binding or runtime errors
+ * - Registers SIGINT/SIGTERM handlers for graceful shutdown
+ */
 async function startServer() {
   return new Promise((resolve, reject) => {
     const server = app.listen(config.applicationPort, () => {
@@ -30,6 +38,12 @@ async function startServer() {
       reject(err);
     });
 
+    /**
+     * Clean exit function
+     *  - Stop Log 
+     *  - Stop Express Server
+     *  - Stop Electron App 
+     */
     const gracefulExit = () => {
       logSessionEnd();
       server.close(() => {

server/services/download.services.js

@@ -8,13 +8,45 @@ const path = require("path");
 const { isSafePath } = require("../helpers/validation.helpers");
 const { configFeatures } = require("../../config.js");
 
+/**
+ * Reference to the currently running yt-dlp process.
+ *
+ * Used to support download cancellation and lifecycle
+ * management.
+ *
+ * @type {import("child_process").ChildProcess|null}
+ */
 let currentDownloadProcess = null;
 
-// Détecte si une URL est une playlist
+/**
+ * Determines whether a URL targets a playlist.
+ *
+ * The detection is based on the presence of the YouTube
+ * playlist query parameter (`list`).
+ *
+ * @param {string} url - URL to inspect.
+ * @returns {boolean} True if the URL appears to be a playlist.
+ */
 function isPlaylistUrl(url) {
   return url.includes("?list=") || url.includes("&list=");
 }
 
+/**
+ * Creates a dedicated download folder for a playlist.
+ *
+ * The playlist title is sanitized to ensure it can be safely
+ * used as a filesystem path. If the target folder already
+ * exists, an incremented suffix is appended until a unique
+ * folder name is found.
+ *
+ * If folder creation fails, a fallback folder named
+ * "Untitled Playlist X" is generated.
+ *
+ * @param {string} basePath - Parent download directory.
+ * @param {string} playlistTitle - Playlist title returned by yt-dlp.
+ * @returns {string} Absolute path of the created playlist folder.
+ * @throws {Error} If no valid folder can be created.
+ */
 function createPlaylistFolder(basePath, playlistTitle) {
   const sanitizedTitle = playlistTitle
     .replace(/[<>:"|?*]/g, '') 
@@ -74,6 +106,32 @@ function createPlaylistFolder(basePath, playlistTitle) {
   }
 }
 
+/**
+ * Starts a yt-dlp download process and monitors its progress.
+ *
+ * Responsibilities:
+ * - Validates and prepares the output directory
+ * - Creates playlist folders when enabled
+ * - Builds yt-dlp command arguments
+ * - Spawns the yt-dlp process
+ * - Parses progress, speed and stage information
+ * - Notifies listeners about download events
+ * - Handles download completion and failures
+ *
+ * @param {Object} options - Download options.
+ * @param {string} options.url - Video or playlist URL.
+ * @param {string} [options.outputFolder] - Destination folder.
+ * @param {string} [options.playlistTitle] - Playlist title.
+ *
+ * @param {Function[]} listeners - Progress listeners.
+ * @param {Function[]} speedListeners - Download speed listeners.
+ * @param {Function[]} stageListeners - Processing stage listeners.
+ * @param {Function[]} playlistInfoListeners - Playlist progress listeners.
+ *
+ * @returns {Promise<string>}
+ * Resolves with the final output folder path once the
+ * download has completed successfully.
+ */
 function fetchDownload(options, listeners, speedListeners, stageListeners, playlistInfoListeners) {
 
   return new Promise((resolve, reject) => {
@@ -191,6 +249,16 @@ function fetchDownload(options, listeners, speedListeners, stageListeners, playl
   });
 }
 
+/**
+ * Cancels the currently running yt-dlp process.
+ *
+ * Attempts to terminate the entire process tree to ensure
+ * that yt-dlp and any spawned FFmpeg processes are stopped.
+ *
+ * @returns {boolean}
+ * True if a download process was cancelled,
+ * otherwise false.
+ */
 function cancelDownload() {
   if (currentDownloadProcess) {
     logger.info("Cancelling download and killing all child processes...");

server/services/info.services.js

@@ -3,8 +3,30 @@ const { userYtDlp, denoPath } = require("../helpers/path.helpers");
 const getUserBrowser = require("../helpers/getBrowser.helpers");
 const { logger } = require("../logger");
 
+/**
+ * Retrieves metadata for a video or playlist using yt-dlp.
+ *
+ * The command executes yt-dlp in JSON mode and returns the
+ * parsed response object without downloading any media.
+ *
+ * Features:
+ * - Supports videos and playlists
+ * - Imports browser cookies when available
+ * - Uses Deno for JavaScript extraction
+ * - Applies a 30-second timeout
+ * - Limits response size to 10 MB
+ *
+ * @param {string} url - Video or playlist URL to inspect.
+ * @returns {Promise<Object>} Resolves with the metadata returned by yt-dlp.
+ *
+ */
 function fetchInfo(url) {
-    const args = [
+
+    /**
+     * Base yt-dlp arguments used to retrieve metadata
+     * without downloading media files.
+     */
+    const metadataArgs  = [
         "--js-runtimes", `deno:${denoPath}`,
         "--dump-single-json",
         "--ignore-errors",
@@ -16,9 +38,9 @@ function fetchInfo(url) {
 
     return new Promise((resolve, reject) => {
 
-        execFile(userYtDlp,[...args, url],
+        execFile(userYtDlp,[...metadataArgs , url],
             {   timeout: 30_000, // 30s, if more timeout
-                maxBuffer: 10 * 1024 * 1024 },  // 10MO max response (Default: 200ko)
+                maxBuffer: 10 * 1024 * 1024 },  // Maximum response size: 10 MB (Node.js default is much smaller)
                 
                 (error, stdout, stderr) => {